© Dr. Gerald Kehr

Dr. Gerald Kehr

group of Prof. G. Erker
Corrensstr. 40
48149 Münster
Room No. 2.03
phone: +49 251 83-36518
email: kehrald@uni-muenster.de

Member of the group since: 1997

Publications:

2020

"Cyclobutene Formation by Borane Catalyzed [2 + 2] Cycloaddition of a Vinylphosphane with Conjugated Ynones", X. Tao, MM Gruber, CG Daniliuc, C. Mück-Lichtenfeld, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2020, 2270-2272 (doi: 10.1002 / ejic.202000293).

"Using the Secondary PH / BH Functional Groups of an Active Geminal Frustrated Lewis Pair for Carbon Monoxide Reduction and Reaction with Nitriles and Isonitriles", J. Li, C. Mück-Lichtenfeld, CG Daniliuc, G. Kehr, G. Erker , Angew. Chem. 2020, 132, 12577-12583 (doi: 10.1002 / anie.202000612); "Using the Secondary PH / BH Functional Groups of an Active Geminal Frustrated Lewis Pair for Carbon Monoxide Reduction and Reaction with Nitriles and Isonitriles", J. Li, C. Mück-Lichtenfeld, CG Daniliuc, G. Kehr, G. Erker, Angew. Chem. Int. Ed2020, 59, 12477-12483 (doi: 10.1002 / anie.202000612).

"Total Chemical Syntheses of the GM3 and F − GM3 Ganglioside Epitopes and Comparative Pre-Clinical Evaluation for Non-Invasive Imaging of Oligodendrocyte Differentiation", TJ Kieser, N. Santschi, L. Nowack, A. Axer, G. Kehr, S. Albrecht, R. Gilmour, ACS Chem. Neurosci2020, 11, 2129-2136 (doi: 10.1021 / acschemneuro.0c00319). 

"Reaction of an anionic chelate phosphane / borata-alkenes ligand with [Rh (nbd) Cl] 2, [Rh (CO) 2Cl] 2 and [Ir (cod) Cl] 2", K. Watanabe, A. Ueno , X. Tao, K. Škoch, X. Jie, S. Vagin, B. Rieger, CG Daniliuc, M. Letzel, G. Kehr, G. Erker, Chem. Sci2020, 11, 7349-7355 (doi: 10.1039 / d0sc02223c).

"Halogen-directed chemical sialylation: pseudostereodivergent access to marine ganglioside epitopes", T. Hayashi, A. Axer, G. Kehr, K. Bergander, R. Gilmour, Chem. Sci. 2020, 11, 6527-6531 (doi: 10.1039 / d0sc01219j). 

"Borane-Mediated Vinylphosphane Cycloaddition to Conjugated Ynones", J. Li, CG Daniliuc, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2020, 1096-1100 (doi: 10.1002 / ejic.201901085). 

"Solid-State NMR Techniques for the Structural Characterization of Cyclic Aggregates Based on Borane-Phosphane Frustrated Lewis Pairs", R. Knitsch, M. Brinkkötter, T. Wiegand, G. Kehr, G. Erker, MR Hansen, H. Eckert, Molecules 2020, 25, 1400 (doi: 10.3390 / molecules25061400).

"Borane-induced ring closure reaction of oligomethylene-linked bis-allenes", X. Tao, K. Škoch, CG Daniliuc, G. Kehr, G. Erker, Chem. Sci. 2020, 11, 1542-1548 (doi: 10.1039 / c9sc03870a). 

"Cycloaddition Reactions of an Active Cyclic Phosphane / Borane Pair with Alkenes, Alkynes and Carbon Dioxide", X. Jie, Q. Sun, CG Daniliuc, R. Knitsch, MR Hansen, H. Eckert, G. Kehr, G. Erker, Chem. Eur. J. 2020, 26, 1269-1273 (doi: 10.1002 / chem.201905171). 

"Formation of Active Cyclic Five-membered Frustrated Phosphane / Borane Lewis Pairs and their Cycloaddition Reactions", S. Dong, CG Daniliuc, G. Kehr, G. Erker, Chem. Eur. J. 2020, 26, 745-753 (doi: 10.1002 / chem.201904919). 


2019

"Diels-Alder route to norbornane derived vicinal phosphane / borane frustrated Lewis pairs for the metal-free catalytic hydrogenation of α, β-unsaturated ketones", C. Wölke, CG Daniliuc, G. Kehr, G. Erker, J. Organomet. Chem. 2019, 899, 120879 (doi: 10.1016 / j.jorganchem.2019.120879). 

"Multi-Component Synthesis of Rare 1,3-Dihydro-1,3-azaborinine Derivatives: Application of a Bora-Nazarov Type Reaction", J. Li, CG Daniliuc, C. Mück-Lichtenfeld, G. Kehr, G Oriel, Angew. Chem. 2019, 131, 15521-15524 (doi: 10.1002 / ange.201909530);  "Multi-Component Synthesis of Rare 1,3-Dihydro-1,3-azaborinine Derivatives: Application of a Bora-Nazarov Type Reaction", J. Li, CG Daniliuc, C. Mück-Lichtenfeld, G. Kehr, G. Erker , Angew.  Chem. Int.  Ed.  2019, 58, 15377-15380 (doi: 10.1002 / anie.201909530).

"Arylallenes and the halogeno-B (C6F5) 2 reagents: facile formation of 2-borylindenes", X. Tao, CG Daniliuc, K. Soloviova, CA Strassert, G. Kehr, G. Erker, Chem. Commun2019, 55, 10166-10169 (doi: 10.1039 / c9cc04199k). 

"Carbon-carbon bond forming reactions of acetylenic esters and ketones within frustrated phosphane / borane Lewis pair frameworks", L. Wang, J. Li, D. Deng, CG Daniliuc, C. Mück-Lichtenfeld, G. Kehr, G Erker, Dalton Trans. 2019, 48, 11921-11926 (doi: 10.1039 / c9dt02624j). 

"Dihydrogen Splitting by Intramolecular Borane-Phosphane Frustrated Lewis Pairs: A Comprehensive Characterization Strategy Using Solid State NMR and DFT Calculations", R. Knitsch, T. Özgün, G.-Q. Chen, G. Kehr, G. Erker, MR Hansen, H. Eckert, ChemPhysChem 2019, 20, 1937-1849 (doi: 10.1002/cphc.201900406.)

"The XB (C6F5) 2 Halogenoborane Route to Phosphole Derivatives", J. Möricke, A. Ueno, B. Wibbeling, CG Daniliuc, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2019, 2912-2917 (doi: 10.1002 / ejic.201900505). 

"Preparation of the Borane (Fmes) BH2 and its Utilization in the FLP Reduction of Carbon Monoxide and Carbon Dioxide", J. Li, CG Daniliuc, G. Kehr, G. Erker, Angew. Chem. 2019, 131, 6809-6813 (doi: 10.1002 / ange.201901634);  "Preparation of the Borane (Fmes) BH2 and its Utilization in the FLP Reduction of Carbon Monoxide and Carbon Dioxide", J. Li, CG Daniliuc, G. Kehr, G. Erker, Angew.  Chem. Int.  Ed.  2019, 58, 6737-6741 (doi: 10.1002 / anie.201901634).  [Corrigendum: Angew.  Chem. 2019, 131, 10899 (doi: 10.1002 / anie.201906798);  Angew.  Chem. Int.  Ed.  2019, 58, 10785 (doi: 10.1002 / anie.201906798)

"Macrocycle Formation by Cooperative Selection at a Double-Sited Frustrated Lewis Pair", L. Wang, D. Deng, K. Škoch, CG Daniliuc, G. Kehr, G. Erker, Organometallics 2019, 38, 1897-1902 (doi: 10.1021 / acs.organomet.9b00002). 

"Unsaturated vicinal frustrated phosphane / borane Lewis pairs as ligands in gold (I) chemistry", A. Ueno, K. Watanabe, CG Daniliuc, G. Kehr, G. Erker, Chem. Commun. 2019, 55, 4367-4370 (doi.10.1039 / c9cc01136f). 

"Consecutive intermolecular 1,1-carboboration reactions of Me3Si-substituted alkynes with the halogeno-B (C6F5) 2 reagents", K. Škoch, C. Pauly, CG Daniliuc, K. Bergander, G. Kehr, G. Erker, Dalton Trans. 2019, 48, 4837-4845 (doi: 10.1039 / c9dt00413k).

"Characterization of H2-Splitting Products of Frustrated Lewis Pairs: Benefit of Fast Magic-Angle Spinning", AA Malär, S. Dong, G. Kehr, G. Erker, BH Meier, T. Wiegand, ChemPhysChem 2019, 20, 672- 679 (doi: 10.1002 / cphc.201900006). 

"Stereospecific -sialylation by site-selective fluorination", T. Hayashi, G. Kehr, K. Bergander, R. Gilmour, Angew. Chem. 2019, 131, 3854-3858 (doi: 10.1002 / ange.201812963);  "Stereospecific -sialylation by site-selective fluorination", T. Hayashi, G. Kehr, K. Bergander, R. Gilmour, Angew.  Chem. Int.  Ed.  2019, 58, 3814-3818 (doi: 10.1002 / anie.201812963). 

"Halogenoborane mediated allene cyclooligomerization", X. Tao, C. Wölke, CG Daniliuc, G. Kehr, G. Erker, Chem. Sci2019, 10, 2478-2482 (doi: 10.1039 / c8sc04790a).

"The Taming of Redox-Labile Phosphidotitanocene Cations", AT Normand, Q. Bonnin, S. Brandès, P. Richard, P. Fleurat-Lessard, C. Devillers, C. Balan, P. Le Gendre, G. Kehr , G. Erker, Chem. Eur. J. 2019, 25, 2803-2815 (doi: 10.1002 / chem.201805430).

"Aggregation Behavior of a Six-Membered Cyclic Frustrated Phosphane / Borane Lewis Pair: Formation of a Supramolecular Cyclooctameric Macrocyclic Ring System", X. Jie, CG Daniliuc, R. Knitsch, MR Hansen, H. Eckert, S. Ehlert, S. Grimme, G. Kehr, G. Erker,  Angew. Chem. 2019 , 131 , 892-896. doi: 10.1002 / anie.201811873 ; "Aggregation Behavior of a Six-Membered Cyclic Frustrated Phosphane / Borane Lewis Pair: Formation of a Supramolecular Cyclooctameric Macrocyclic Ring System", X. Jie, CG Daniliuc, R. Knitsch, MR Hansen, H. Eckert, S. Ehlert, S. Grimme, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2019 , 58 , 882-886.doi: 10.1002 / anie.201811873 .

"Developing carbon Lewis base / boron Lewis acid frustrated Lewis pair chemistry derived from conjugated dienamines", J. Möricke, F. Rehwinkel, T. Danelzik, CG Daniliuc, B. Wibbeling, G. Kehr, G. Erker, Tetrahedron 2019 , 75 , 571-579. doi: 10.1016 / j.tet.2018.11.068.


2018

"Phosphirenium borate betaines from alkynylphosphanes and the halogeno-B (C6F5) 2 reagents ", A. Ueno, J. Möricke, CG Daniliuc, G. Kehr, G. Erker, Chem. Commun. 2018 , 54 , 13746-13749. doi: 10.1039 / c8cc07189f.

" Exploring physicochemical space via a bioisostere of the trifluoromethyl and ethyl groups (BITE): attenuating lipophilicity in fluorinated analogues of Gilenya ® for multiple sclerosis ", N. Erdeljac, G. Kehr, M. Ahlqvist, L. Knerr, R. Gilmour, Chem. Commun. 2018 , 54 , 12002-12005. doi: 10.1039 / c8cc05643a.

"A convenient route to internally phosphane-stabilized aryltriborane (7) compounds", J. Li, CG Daniliuc, G. Kehr, G. Erker, Chem. Commun. 2018 , 54 , 12606-12609. doi: 10.1039 / c8cc06728g.

"The Borole Route to Reactive Pentafluorophenyl-Substituted Diboranes (4)", F. Ge, X. Tao, CG Daniliuc, G. Kehr, G. Erker, Angew. Chem. 2018 , 130 , 14778-14782. doi: 10.1002 / anie.201807743 ; "The Borole Route to Reactive Pentafluorophenyl-substituted Diboranes (4)", F. Ge, X. Tao, CG Daniliuc, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2018 , 57, 14570-14574. doi: 10.1002 / anie.201807743.

"The special role of B (C 6 F 5 ) 3 in the single electron reduction of quinones by radicals", X. Tao, CG Daniliuc, R. Knitsch, MR Hansen, H. Eckert, M. Lübbesmeyer, A. Studer, G. Kehr, G. Erker, Chem. Sci. 2018 , 9 , 8011-8018. doi: 10.1039 / c8sc03005g.

" Borane-Induced Dimerization of Arylallenes ", X. Tao, CG Daniliuc, D. Dittrich, G. Kehr, G. Erker, Angew. Chem. 2018 , 130 , 14118-14122. doi: 10.1002 / anie.201808436 ; " Borane-Induced Dimerization of Arylallenes ", X. Tao, CG Daniliuc, D. Dittrich, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2018 , 57 , 13922-13926. doi: 10.1002 / anie.201808436.

"A Route toward (Aminomethyl)cyclopentadienide Ligands and Their Group 4 Metal Complexes", Q. Bonnin, S.-Y. Wong, C. Balan, V. Comte, R. Malacea, M.-J. Penouilh, P. Richard, G. Kehr, A. T. Normand, G. Erker, P. Le Gendre, Eur. J. Inorg. Chem. 2018, 3813-3821. doi: 10.1002/ejic.201800636.

"Unusual 1,1-Hydroboration Route to a Reactive Unsaturated Vicinal Frustrated Phosphine/Borane Lewis Pair", A. Ueno, X. Tao, C. G. Daniliuc, G. Kehr, G. Erker, Organometallics 2018, 37, 2665-2668. doi: 10.1021/acs.organomet.8b00481.

"Formation of borata-alkene/iminium zwitterions by ynamine hydroboration", L. Wang, Z. Jian, C. G. Daniliuc, G. Kehr, G. Erker, Dalton Trans. 2018, 47, 10853-10856. doi: 1039/c8dt02435a.

"Metal-free Acetylene Coupling by the (C6F5)2B-X 1,2-Halogenoboration Reaction", A. Ueno, J. Li, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Eur. J. 2018, 24, 10044-10048. doi: 10.1002/chem.201802084.

"Fluorocyclisation via I(I)/I(III) catalysis: a concise route to fluorinated oxazolines", F. Scheidt, C. Thiehoff, G. Yilmaz, S. Meyer, C. G. Daniliuc, G. Kehr, R. Gilmour, Beilstein J. Org. Chem. 2018, 14, 1021-1027. doi: 10.3762/bjoc.14.88.

"Formation of macrocyclic ring systems by carbonylation of trifunctional P/B/B frustrated Lewis pairs", L. Wang, S. Dong, C. G. Daniliuc, L. Liu, S. Grimme, R. Knitsch, H. Eckert, M. R. Hansen, G. Kehr, G. Erker, Chem. Sci. 2018, 9, 1544-1550. doi: 10.1039/c7sc04394e.

"Harnessing the MaltodextrinTransport Mechanism for Targeted Bacterial Imaging: Structural Requirements for Improved in vivo Stability in Tracer Design", A. Axer, S. Hermann, G. Kehr, D. Clases, U. Karst, L. Fischer-Riepe, J. Roth, M. Fobker, M. Schäfers, R. Gilmour, A. Faust, ChemMedChem 2018, 13, 241-250. doi: 10.1002/cmdc.201700543.

"Single Site Fluorination of the GM4 Ganglioside Epitope Upregulates Oligodendrocyte Differentiation", T. J. Kieser, N. Santschi, L. Nowack, G. Kehr, T. Kuhlmann, S. Albrecht, R. Gilmour, ACS Chem. Neurosci. 2018, 9, 1159-1165. doi: 10.1021/acschemneuro.8b00002.

"Formation of Reactive π-Conjugated Frustrated N/B Pairs by Borane-Induced Propargyl Amine Rearrangement", T. Wang, C. G. Daniliuc, C. Mück-Lichtenfeld, G. Kehr, G. Erker, J. Am. Chem. Soc. 2018, 140, 3635-3643. doi: 10.1021/jacs.7b11958.

"Metal-Free Carbonylation Route to a Reactive Borataepoxide System", T. Wang, G. Kehr, C. G. Daniliuc, G. Erker, Organometallics 2018, 37, 1040-1049. doi: 10.1021/acs.organomet.8b00035.

"Formation and reactions of active five-membered phosphane/borane frustrated Lewis pair ring systems", S. Dong, L. Wang, T. Wang, C. G. Daniliuc, M. Brinkkötter, H. Eckert, G. Kehr, G. Erker, Dalton Trans. 2018, 47, 4449-4454. doi: 10.1039/c8dt00672e.

"Fluorine-Directed Glycosylation Enables the Stereocontrolled Synthesis of Selective SGLT2 Inhibitors for Type II Diabetes", A. Sadurní, G. Kehr, M. Ahlqvist, J. Wernevik, H. P. Sjögren, C. Kankkonen, L. Knerr, R. Gilmour, Chem. Eur. J. 2018, 24, 2832-2836. doi: 10.1002/chem.201705373.

"Solid state frustrated Lewis pair chemistry", L. Wang, G. Kehr, C. G. Daniliuc, M. Brinkkötter, T. Wiegand, A.-L. Wübker, H. Eckert, L. Liu, J. G. Brandenburg, S. Grimme, G. Erker, Chem. Sci. 2018, 9, 4859-4865. doi: 10.1039/c8sc01089g.

"Zirconocene mediated acetylboron chemistry", Z. Jian, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Commun. 2018, 54, 5724-5727. doi: 10.1039/c8cc02680g.

"Conformational control enabled by the fluorine gauche effect in a model of the β2-AR agonist salbutamol (Ventolin™)", C. S. Teschers, C. G. Daniliuc, G. Kehr, R. Gilmour, J. Fluorine Chem. 2018, 210, 1-5. doi: 10.1016/j.jfluchem.2018.02.007.

"Selective formation of heterocyclic trans-cycloalkenes by alkyne addition to a biphenylene-based phosphane/borane frustrated Lewis pair", J. Li, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Commun. 2018, 54, 6344-6347. doi: 10.1039/c8cc03369b.

2017


"Frustrated Lewis Pair Behavior of an Open, Noninteracting Phosphane/Borane Pair at a Rigid Organic Framework: Exploring Decisive Factors for FLP Acitivity", K.-Y. Ye, C. G. Daniliuc, S. Dong, G. Kehr, G. Erker, Organometallics 2017, 36, 5003-5012. doi: 10.1021/acs.organomet.7b00819.

"Reduction of Dioxygen by Radical/B(C6F4X)3 Pairs to Give Isolable Bis(borane) Superoxide Compounds", X. Tao, C. G. Daniliuc, O. Janka, R. Pöttgen, R. Knitsch, M. R. Hansen, H. Eckert, M. Lübbesmeyer, A. Studer, G. Kehr, G. Erker, Angew. Chem. 2017, 129, 16868-16871 doi: 10.1002/ange.201709309; "Reduction of Dioxygen by Radical/ B(C6F4X)3 Pairs to Give Isolable Bis(borane)superoxide Compounds", X. Tao, C. G. Daniliuc, O. Janka, R. Pöttgen, R. Knitsch, M. R. Hansen, H. Eckert, M. Lübbesmeyer, A. Studer, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2017, 56, 16641-16644 doi: 10.1002/anie.201709309.

"Deconstructing the Catalytic, Vicinal Difluorination of Alkenes: HF-Free Synthesis and Structural Study of p-TolIF2", J. C. Sarie, C. Thiehoff, R. J. Mudd, C. G. Daniliuc, G. Kehr, R. Gilmour, J. Org. Chem. 2017, 82, 11792-11798. doi: 10.1021/acs.organomet.7b00558.

"Utilizing the TEMPO Radical in Zirconocene Cation and Hydrido Zirconocene Chemistry", Y.-L. Liu, G. Kehr, C. G. Daniliuc, G. Erker, Organometallics 2017, 36, 3407-3414. doi: 10.1021/acs.joc.7b01671.

"Making Use of the Functional Group Combination of a Phosphane/Borane Lewis Pair Connected by an Unsaturated Four-Carbon Bridge", G.-Q. Chen, C. G. Daniliuc, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2017, 4519–4524. doi: 10.1002/ejic.201700570.

"Phosphine-Borane Frustrated Lewis Pairs Derived from a 1,1’-Disubstituted Ferrocene Scaffold: Synthesis and Hydrogenation Catalysis ", Z. Jian, S. Krupski, K. Škoch, G. Kehr, C. G. Daniliuc, I. Císařová, P. Štěpnička, G. Erker, Organometallics 2017, 36, 2940-2946. doi: 10.1021/acs.organomet.7b00363.

"Borata-Wittig olefination reactions of ketones, carboxylic esters and amides with bis(pentafluorophenyl)-borata-alkene reagents", T. Wang, S. Kohrt, C. G. Daniliuc, G. Kehr, G. Erker, Org. Biomol. Chem. 2017, 15, 6223-6232. doi: 10.1039/c7ob01591g.

"A hydroboration route to geminal P/B frustrated Lewis pairs with a bulky secondary phosphane component and their reaction with carbon dioxide", Z. Jian, G. Kehr, C. G. Daniliuc, B. Wibbeling, G. Erker, Dalton Trans. 2017, 46, 11715-11721. doi: 10.1039/c7dt02315d.

"Metal-Free Arene and Heteroarene Borylation Catalysed by Strongly Electrophilic Bis-boranes", Y.-L. Liu, G. Kehr, C. G. Daniliuc, G. Erker, Chem. Eur. J. 2017, 23, 12141-12144. doi: 10.1002/chem.201701771.

"Selective Metal-free HB(C6F5)2 Catalyzed Allene Cyclotrimerization: Formation of 1,3,5-Trimethylenecyclohexane and Its Trishydroboration Product", X. Tao, G. Kehr, C. G. Daniliuc, G. Erker, Angew. Chem. 2017, 129, 1396-1400. doi: 10.1002/ange.201610530. "Selective Metal-free HB(C6F5)2 Catalyzed Allene Cyclotrimerization: Formation of 1,3,5-Trimethylenecyclohexane and Its Trishydroboration Product", X. Tao, G. Kehr, C. G. Daniliuc, G. Erker, Angew. Chem. Int. Ed. 2017, 56, 1376-1380. doi: 10.1002/anie.201610530.

"Frustrated Lewis Pair Chemistry: Searching for New Reactions", G. Kehr, G. Erker, Chem. Rec. 2017, 17, 803-815. 10.1002/tcr.201700010.

"The Tris(pentafluorophenyl)borane-Catalyzed Reaction of Phosphorus/Boron and Nitrogen/Boron Frustrated Lewis Pair Dihydrogen Activation Products with Alkenes and Alkynes", T. Wang, X. Jentgens, C. G. Daniliuc, G. Kehr, G. Erker, ChemCatChem. 2017, 9, 651-658. doi: 10.1002/cctc.201601229.

"Reactions of strongly electrophilic alkenyl(pentafluorophenyl)boranes with the TEMPO Radical", X. Tao, F. Türkyilmaz, C. G. Daniliuc, G. Kehr, G. Erker, J. Organomet. Chem. 2017, 847, 167-172. doi: 10.1016/j.jorganchem.2017.03.030.

"Frustrated Lewis Pair vs Metal-Carbon σ-Bond Insertion Chemistry at an o-Phenylene-Bridged Cp2Zr+/PPh2 System", Z. Jian, C. G. Daniliuc, G. Kehr, G. Erker, Organometallics 2017, 36, 424-434. doi: 10.1021/acs.organomet.6b00828.

"Intermolecular Redox-Neutral Amine C-H Functionalization Induced by the Strong Boron Lewis Acid B(C6F5)3 in the Frustrated Lewis Pair Regime", G.-Q. Chen, G. Kehr, C. G. Daniliuc, M. Bursch, S. Grimme, G. Erker, Chem. Eur. J. 2017, 23, 4723-4729. doi: 10.1002/chem.201700477.

"Reversible formylborane/SO2 coupling at a frustrated Lewis pair", K.-Y. Ye, M. Bursch, Z.-W. Qu, C. G. Daniliuc, S. Grimme, G. Kehr, G. Erker, Chem. Commun. 2017, 53, 633-635. doi: 10.1039/c6cc07071j.

"CO-Reduction Chemistry: Reaction of a CO-Derived Formylhydridoborate with Carbon Monoxide, with Carbon Dioxide, and with Dihydrogen", Z. Jian, G. Kehr, C. G. Daniliuc, B. Wibbeling, T. Wiegand, M. Siedow, H. Eckert, M. Bursch, S. Grimme, G. Erker, J. Am. Chem. Soc. 2017, 139, 6474-6483. doi: 10.1021/jacs.7b02548.

"The Chemistry of a Non-Interacting Vicinal Frustrated Phosphane/Borane Lewis Pair", L.-M. Elmer, G. Kehr, C. G. Daniliuc, M. Siedow, H. Eckert, M. Tesch, A. Studer, K. Williams, T. H. Warren, G. Erker, Chem. Eur. J. 2017, 23, 6056-6068. doi: 10.1002/chem.201603954.

"Design and reactions of a carbon Lewis base/boron Lewis acid frustrated Lewis pair", J. Möricke, B. Wibbeling, C. G. Daniliuc, G. Kehr, G. Erker, Phil. Trans R. A 2017, 375, 20170015. doi: 10.1098/rsta.2017.0015.

"CO/CO, CO/NO and NO/NO coupling at a hidden frustrated Lewis pair templates", T. Wang, L. Wang, C. G. Daniliuc, K. Samigullin, M. Wagner, G. Kehr, G. Erker, Chem. Sci. 2017, 8, 2457-2463. doi: 10.1039/c6sc04459j.

"Cooperative carbon monoxide to formyl reduction at a trifunctional PBB frustrated Lewis pair", L.Wang, S. Zhang, Y. Hasegawa, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Commun. 2017, 53, 5499-5502. doi: 10.1039/c7cc02214j.

"A Ferrocene based Phosphane/Borane Frustrated Lewis Pair for Asymmetric Imine Reduction", K.-Y. Ye, X. Wang, C. G. Daniliuc, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2017, 368-371. doi: 10.1002/ejic.201600834.

"Synthesis of a Small Cyclic Frustrated Phosphane/Borane Lewis Pair", J. Ugolotti, G. Kehr, C. G. Daniliuc, G. Erker, Synthesis 2017, 49, 53-58. doi: 10.1055/s-0036-1588597.

"Geminal bis-borane formation by borane Lewis acid induced cyclopropyl rearrangement and its frustrated Lewis pair reaction with carbon dioxide", Y.-L. Liu, G. Kehr, C. G. Daniliuc, G. Erker, Chem. Sci. 2017, 8, 1097-1104. doi: 10.1039/c6sc03468c.

2016


"Coupling of Carbon Monoxide with Nitrogen Monoxide at a Frustrated Lewis Pair Template", K.-Y. Ye, G. Kehr, C. G. Daniliuc, L. Liu, S. Grimme, G. Erker, Angew. Chem. 2016, 128, 9362-9365. doi: 10.1002/ange.201603760. "Coupling of Carbon Monoxide with Nitrogen Monoxide at a Frustrated Lewis Pair Template", K.-Y. Ye, G. Kehr, C. G. Daniliuc, L. Liu, S. Grimme, G. Erker, Angew. Chem. Int. Ed. 2016, 55, 9216-9219. doi: 10.1002/anie.201603760.

"Phospha-Claisen Type Reactions at Frustrated Lewis Pair Frameworks", G.-Q. Chen, G. Kehr, C. Mück-Lichtenfeld, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2016, 138, 8554-8559. doi: 10.1021/jacs.6b04046.

"A Frustrated Phosphane-Borane Lewis Pair and Hydrogen: A Kinetics Study", T. Özgün, K. Bergander, L. Liu, C. G. Daniliuc, S. Grimme, G. Kehr, G. Erker, Chem. Eur. J. 2016, 22, 11958-11961. doi: 10.1002/chem.201603050.

"Unsaturated Vicinal Frustrated Lewis Pair Formation by Electrocyclic Ring Closure and Their Reaction with Nitric Oxide", T. Özgün, G.-Q. Chen, C. G. Daniliuc, A. C. McQuilken, T. H. Warren, R. Knitsch, H. Eckert, G. Kehr, G. Erker, Organometallics 2016, 35, 3667-3680. doi: 10.1021/acs.organomet.6b00627.

"Indirect synthesis of a pair of formal methane activation products at a phosphane/borane frustrated Lewis pair", S. Frömel, C. G. Daniliuc, C. Bannwarth, S. Grimme, K. Bussmann, G. Kehr, G. Erker, Dalton Trans. 2016, 45, 19230-19233. doi: 10.1039/c6dt04206f.

"Selective Oxidation of an Active Intramolecular Amine/Borane Frustrated Lewis Pair with Dioxygen", T. Wang, G. Kehr, L. Liu, S. Grimme, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2016, 138, 4302-4305. doi: 10.1021/jacs.6b00325.

"A Ferrocene based Phosphane/Borane Frustrated Lewis Pair for Asymmetric Imine Reduction", K.-Y. Ye, X. Wang, C. G. Daniliuc, G. Kehr, G. Erker, Eur. J. Inorg. Chem. Soc. 2016, 368-371. doi: 10.1002/ejic.201600834.

"Rapid Dihydrogen Cleavage by Persistent Nitroxide Radicals under Frustrated Lewis Pair Conditions", X. Tao, G. Kehr, X. Wang, C. G. Daniliuc, S. Grimme, G. Erker, Chem. Eur. J. 2016, 22, 9504-9507. doi: 10.1002/chem.201602058.

"An Ethylene-Bridged Phosphane/Borane Frustrated Lewis Pair Featuring the –B(Fxyl)2 Lewis Acid Component", L. Wang, K. Samigullin, M. Wagner, A. C. McQuilken, T. H. Warren, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Eur. J. 2016, 22, 11015-11021. doi: 10.1002/chem.201601583.

"Borata-Alkene Derived Syntheses of (F5C6)2B-Substituted Bis(indenyl) Group 4 Metal Complexes", S. Kohrt, G. Kehr, C. G. Daniliuc, R. S. Rojas, B. Rieger, C. Troll, G. Erker, Organometallics 2016, 35, 2689-2693. doi: 10.1021/acs.organomet.6b00427.

"Aminoxyl Radicals of B/P Frustrated Lewis Pairs: Refinement of the Spin-Hamiltonian Parameters by Field- and Temperature Dependent Pulsed EPR Spectroscopy", M. de Oliveira Jr., R. Knitsch, M. Sajid, A. Stute, L.-M. Elmer, G. Kehr, G. Erker, C. J. Magon, G. Jeschke, H. Eckert, PLoS One 2016, 1/22. doi: 10.1371/journal.pone.0157944.

"Cyclic Amine/Borane Lewis Pairs by the Reaction of N,N-Diallylaniline with Lancaster’s H2B-C6F5 Reagent", T. Wang, L. Liu, S. Grimme, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Asian J. 2016, 11, 1394-1399. doi: 10.1002/asia.201600060.

"Direct P-functionalization of azobenzene by a cationic phosphidozirconocene complex", A. T. Normand, C. G. Daniliuc, G. Kehr, P. Le Gendre, G. Erker, Dalton Trans. 2016, 45, 3711-3714. doi: 10.1039/c6dt00416d.

"Nitro-redox reactions at a frustrated borane/phosphane Lewis pair", G.-Q. Chen, G. Kehr, C. G. Daniliuc, G. Erker, Dalton Trans. 2016, 45, 6820-6823. doi: 10.1039/c6dt00857g.

"Why Does the Intramolecular Trimethylene-Bridged Frustrated Lewis Pair Mes2PCH2CH2CH2B(C6F5)2 Not Activate Dihydrogen?", T. Özgün, K.-Y. Ye, C. G. Daniliuc, B. Wibbeling, L. Liu, S. Grimme, G. Kehr, G. Erker, Chem. Eur. J. 2016, 22, 5988-5995. doi: 10.1002/chem.201505200.

"Advanced 1,1-carboboration reactions with pentafluorophenylboranes", G. Kehr, G. Erker, Chem. Sci. 2016, 7, 56-65. doi: 10.1039/c5sc03282b.

"Unusual borane addition to conjugated dienylphosphanes under frustrated Lewis pair conditions", S. Krupski, G. Kehr, C. G. Daniliuc, G. Erker, Dalton Trans. 2016, 45, 6111-6117.doi: 10.1039/c5dt03879k.

"Cyclopropane formation under frustrated Lewis pair conditions", S. Krupski, G. Kehr, C. G. Daniliuc, G. Erker, Chem. Commun. 2016, 52, 2695-2697.doi: 10.1039/c5cc09585a.

"Selective N,O-Addition of the TEMPO Radical to Conjugated Boryldienes", F. Türkyilmaz, G. Kehr, J. Li, C. G. Daniliuc, M. Tesch, A. Studer, G. Erker, Angew. Chem. 2016, 128, 1492-1495. doi: 10.1002/ange.201509114; "Selective N,O-Addition of the TEMPO Radical to Conjugated Boryldienes", F. Türkyilmaz, G. Kehr, J. Li, C. G. Daniliuc, M. Tesch, A. Studer, G. Erker, Angew. Chem. Int. Ed. 2016, 55, 1470-1473. doi: 10.1002/ange.201509114.

"Cooperative reaction chemistry derived from a borata-diene framework", J. Yu, G. Kehr, C. G. Daniliuc, G. Erker, Chem. Commun. 2016, 52, 1393-1396.doi: 10.1039/c5cc07954c.

"Insertion Reactions of Neutral Phosphidozirconocene Complexes as a Convenient Entry into Frustrated Lewis Pair Territory", A. T. Normand, C. G. Daniliuc, B. Wibbeling, G. Kehr, P. Le Gendre, G. Erker, Chem. Eur. J. 2016, 22, 4285-4293. doi: 10.1002/chem.201504792.

"FLPNO Nitroxide Radical Formation by a 1,1-Carboboration Route", R. Liedtke, C. Eller, C. G. Daniliuc, K. Williams, T. H. Warren, M. Tesch, A. Studer, G. Kehr, G. Erker, Organometallics 2016, 35, 55-61. doi: 10.1021/acs.organomet.5b00886

"Formation of Thermally Robust Frustrated Lewis Pairs by Electrocyclic Ring Closure Reactions", G.-Q. Chen, G. Kehr, C. G. Daniliuc, C. Mück-Lichtenfeld, G. Erker, Angew. Chem. 2016, 128, 5616-5620. doi: 10.1002/ange.201510994; "Formation of Thermally Robust Frustrated Lewis Pairs by Electrocyclic Ring Closure Reactions", G.-Q. Chen, G. Kehr, C. G. Daniliuc, C. Mück-Lichtenfeld, G. Erker, Angew. Chem. Int. Ed. 2016, 55, 5526-5530.doi: 10.1002/ange.201510994.

"Phosphole formation by 1,1-carboboration - reactions of bis-alkynyl phosphanes with a frustrated P/B Lewis pair", A. Klose, G. Kehr, C. G. Daniliuc, G. Erker, Dalton Trans. 2016, 45, 2023-2030. doi: 10.1039/c5dt03055b.

"Frustrated Lewis Pair Chemistry Derived from Bulky Allenyl and Propargyl Phosphanes", C. Rosorius, J. Möricke, B. Wibbeling, A. C. McQuilken, T. H. Warren, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Eur. J. 2016, 22, 1103-1113.doi: 10.1002/chem.201502493.

"Cooperative 1,1-addition reactions of vicinal phosphane/borane frustrated Lewis pairs", A. J. P. Cardenas, Y. Hasegawa, G. Kehr, T. H. Warren, G. Erker, Coord. Chem. Rev. 2016, 306, 468-482. doi: 10.1016/j.ccr.2015.01.006.

2015


"Phosphido- and Amidozirconocene Cation-Based Frustrated Lewis Pair Chemistry", A. T. Normand, C. G. Daniliuc, B. Wibbeling, G. Kehr, P. Le Gendre, G. Erker, J. Am. Chem. Soc. 2015, 137, 10796-10808. doi: 10.1021/jacs.5b06551

"Bifunctional Behavior of Unsaturated Intramolecular Phosphane-Borane Frustrated Lewis Pairs Derived from Uncatalyzed 1,4-Hydrophosphination of a Dienylborane", G.-Q. Chen, G. Kehr, C. G. Daniliuc, B. Wibbeling, G. Erker, Chem. Eur. J. 2015, 21, 12449-12455. doi: 10.1002/chem.201501402

"Functionalization of Intramolecular Frustrated Lewis Pairs by 1,1-Carboboration with Conjugated Enynes", A. Feldmann, G. Kehr, C. G. Daniliuc, C. Mück-Lichtenfeld, G. Erker, Chem. Eur. J. 2015, 21, 12456-12464. doi: 10.1002/chem.201502278

"Trisubstituted Boroles by 1,1-Carboboration", F. Ge, G. Kehr, C. G. Daniliuc, C. Mück-Lichtenfeld, G. Erker, Organometallics 2015, 34, 4205-4208. doi: 10.1021/acs.organomet.5b00668

"A 1,1-Carboboration Route to Bora-Nazarov Systems", F. Ge, F. Türkyilmaz, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Asian J. 2015, 10, 2497-2502. doi: 10.1002/asia.201500636.

"Synthesis of new asymmetric substituted boron amidines - Reactions with CO and transfer hydrogenations of phenylacetylene", A. R. Cabrera, R. S. Rojas, M. Valderrama, P. Plüss, H. Berke, C. G. Daniliuc, G. Kehr, G. Erker, Dalton Trans. 2015, 44, 19606-19614. doi: 10.1039/c5dt01966d.

"Enamine/butadienylborane cycloaddition in the frustrated Lewis pair regime", G.-Q. Chen, F. Türkyilmaz, C. G. Danliuc, C. Bannwarth, S. Grimme, G. Kehr, G. Erker, Org. Biomol. Chem. 2015, 13, 10477-10486. doi: 10.1039/c5ob01602a.

"Observation of a Thermally Induced Bora-Nazarov Cyclization at a Phosphole Framework", J. Möbus, G. Kehr, C. G. Daniliuc, C. Mück-Lichtenfeld, G. Erker, Angew. Chem. 2015,127, 12543-12546. doi: 10.1002/ange.201502850. "Observation of a Thermally Induced Bora-Nazarov Cyclization at a Phosphole Framework", J. Möbus, G. Kehr, C. G. Daniliuc, C. Mück-Lichtenfeld, G. Erker, Angew. Chem. Int. Ed. 2015, 54, 12366-12369. doi: 10.1002/anie.201502850.

"Synthesis and structures of N-arylcyano-β-diketiminate zinc complexes and adducts and their application in ring‐opening polymerization of L-lactide", O. S. Trofymchuk, C. G. Daniliuc, G. Kehr, G. Erker, R. S. Rojas, RSC Adv. 2015, 5, 21054-21065. doi: 10.1039/c4ra16670a

"Synthetic Endeavors towards Titanium Based Frustrated Lewis Pairs with Controlled Electronic and Steric Properties", A. T. Normand, P. Richard, C. Balan, C. G. Daniliuc, G. Kehr, G. Erker, P. Le Gendre, Organometallics 2015, 34, 2000-2011. doi: 10.1021/acs.organomet.5b00250

"Stoichiometric Reactions and Catalytic Hydrogenation with a Reactive Intramolecular Zr+/Amine Frustrated Lewis Pair", X. Xu, G. Kehr, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2015, 137, 4550-4557. doi: 10.1021/jacs.5b01623

"Solid-state EPR strategies for the structural characterization of paramagnetic NO adducts of frustrated Lewis pairs (FLPs)", M. de Olivera J., T. Wiegand, L.-M. Elmer, M. Sajid, G. Kehr, G. Erker, C. J. Magon, H. Eckert, J. Chem. Phys. 2015, 142, 124201. doi: 10.1063/1.4916066

"Unusual product formation in a 1,1-carboboration", C. Eller, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Commun. 2015, 51, 8436-8438. doi: 10.1039/c5cc00734h

"Frustrated Lewis Pair Behavior of [Cp2ZrOCR2CH2PPh2]+ Cations", X. Xu, G. Kehr, C. G. Daniliuc, G. Erker, Organometallics 2015, 34, 2655-2661. doi: 10.1021/om501312a

"Thiophene synthesis via 1,1-carboboration", C. Eller, G. Kehr, C. G. Daniliuc, D. W. Stephan, G. Erker, Chem. Commun. 2015, 51, 7226-7229. doi: 10.1039/c5cc01806d

"Structural Characterization of Frustrated Lewis Pairs and their Reaction Products Using Modern Solid State NMR Techniques", T. Wiegand, M. Siedow, H. Eckert, G. Kehr, G. Erker, Isr. J. Chem. 2015, 55, 150-178. doi: 10.1002/ijch.201400149

"P/B-Ketene Adduct Formation from Acyl Chlorides at a Vicinal Phosphane/Borane Frustrated Lewis Pair", S. Frömel, G. Radermacher, B. Wibbeling, C. G. Daniliuc, T. H. Warren, G. Kehr, G. Erker, Isr. J. Chem. 2015, 55, 210-215. doi: 10.1002/ijch.201400133

"Benzannulation of Heterocyclic Frameworks by 1,1-Carboboration Pathways", R. Liedtke, F. Tenberge, C. G. Daniliuc, G. Kehr, G. Erker, J. Org. Chem. 2015, 80, 2240-2248. doi: 10.1021/jo502753s

"Direct synthesis of a geminal zwitterionic phosphonium/hydridoborate system - developing an alternative tool for generating frustrated Lewis pair hydrogen activation systems", J. Yu, G. Kehr, C. G. Daniliuc, C. Bannwarth, S. Grimme, G. Erker, Org. Biomol. Chem. 2015, 13, 5783-5792. doi: 10.1039/c5ob00634a

"Stabilized borata-alkene formation: structural features, reactions and the special role of the counter cation", S. Kohrt, S. Dachwitz, C. G. Daniliuc, G. Kehr, G. Erker, Dalton Trans. 2015, 44, 21032-21040. doi: 10.1039/c5dt04058b

"α−Hydroxymethylation of Pyridines at a Frustrated Lewis Pair Template", M. Sajid, G. Kehr C. G. Daniliuc, G. Erker, Chem. Eur. J. 2015, 21, 1454-1457. doi: 10.1002/chem.201405553

"Reactions of Boroles Formed by 1,1-Carboboration", F. Ge, G. Kehr, C. G. Daniliuc, G. Erker, Organometallics 2015, 34, 229-235. doi: 10.1021/om501085j

"1,1-Alkenylboration of diarylphosphino-enynes: convenient synthetic entry to vicinal P/B Lewis pairs at extended conjugated π-frameworks", G. Chen, G. Kehr, C. G. Daniliuc, G. Erker, Org. Biomol. Chem. 2015, 13, 764-769. doi: 10.1039/c4ob02134g.

"α-CH acidity of alkyl-B(C6F5)2 compounds – the role of stabilized borata-alkene formation in frustrated Lewis pair chemistry", P. Moquist, G.-Q. Chen, C. Mück-Lichtenfeld, K. Bussmann, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Sci. 2015, 6, 816-825. doi: 10.1039/c4sc01711k.

2014


"1,1-Carboboration Reactions of Strongly Electrophilic 2-Borylethyl Thioethers", C. Eller, B. Billmann, C. G. Daniliuc, G. Kehr, G. Erker, Z. Naturforsch. 2014, 69b, 1357-1364.  doi: 10.5560/ZNB.2014-4190.

"Zwitterionic Phosphirenium Borates Derived from Bis(alkynyl)mesityl Phosphanes and Tris(pentafluorophenyl)borane", J. Möbus, K. Malessa, H. Frisch, C. G. Daniliuc, R. Fröhlich, G. Kehr, G. Erker, Heteroat. Chem. 2014, 25, 396-401.  doi: 10.1002/hc.21184.

"Developing Phospha-Stork Chemistry Induced by a Borane Lewis Acid", Y. Hasegawa, C. G. Daniliuc, G. Kehr, G. Erker, Angew. Chem. 2014, 126, 12364-12367.  doi: 10.1002/ange.201406557; "Developing Phospha-Stork Chemistry Induced by a Borane Lewis Acid", Y. Hasegawa, C. G. Daniliuc, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2014, 53, 12168-12171.  doi: 10.1002/anie.201406557.

"Crystal Packing Induced Carbon-Carbon Double-Triple Bond Isomerization in a Zirconocene Complex", J. G. Brandenburg, G. Bender, J. Ren, A. Hansen, S. Grimme, H. Eckert, C. G. Daniliuc, G. Kehr, G. Erker, Organometallics 2014, 33, 5358-5364.  doi: 10.1021/om500678p.

"The Mannich Route to Amino-Functionalized [3]Ferrocenophanes", A. Stute, G. Kehr, G. Erker, Adv. Organomet. Chem. 2014, 62, 219-259. (A. Stute, G. Kehr and G. Erker, The Mannich Route to Amino-Functionalized [3]Ferrocenophanes. In: Pedro J. Pérez, editor, Advances in Organometallic Chemistry, Vol. 62, Burlington: Academic Press, 2014, pp. 219-259).

"Formation of Unsaturated Vicinal Zr+/P Frustrated Lewis Pairs by the Unique 1,1-Carbozirconation Reactions", X. Xu, G. Kehr, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2014, 136, 12431-12443.  doi: 10.1021/ja5068146.

"Formation, structural characterization, and reactions of a unique cyclotrimeric vicinal Lewis pair containing (C6F5)2P-Lewis base and (C6F5)BH-Lewis acid components", M. Erdmann, T. Wiegand, J. Blumenberg, H. Eckert, J. Ren, C. G. Daniliuc, G. Kehr, G. Erker, Dalton Trans. 2014, 43, 15159-15169.  doi: 10.1039/c4dt02081b.

"Reactivity of an Intramolecular Fluorophosphonium Fluoroborate", O. Ekkert, C. B. Caputo, C. Pranckevicius, C. G. Daniliuc, G. Kehr, G. Erker, D. W. Stephan, Chem. Eur. J. 2014, 20, 11287-11290.  doi: 10.1002/chem.201403110.

"Preparation of Dithienylphospholes by 1,1-Carboboration", J. Möbus, A. Galstyan, A. Feldmann, C. G. Daniliuc, R. Fröhlich, C. A. Strassert, G. Kehr, G. Erker, Chem. Eur. J. 2014, 20, 11883-11893.  doi: 10.1002/chem.201403102.

"Polymorphism in P,P-[3]ferrocenophanes: insights from an NMR crystallographic approach", T. Wiegand, D. Lüdeker, G. Brunklaus, K. Bussmann, G. Kehr, G. Erker, H. Eckert, Dalton Trans. 2014, 43, 12639-12647.  doi: 10.1039/c4dt01071j.

"Controlling two-phase self assembly of an adenine derivative on HOPG via kinetic effects", C. Wang, P. K. Jana, H. Zhang, Z. Mu, G. Kehr, T. Blömker, G. Erker, H. Fuchs, A. Heuer, L, Chi, Chem. Commun. 2014, 50, 9192-9195.  doi: 10.1039/c4cc03714f.

"Catalytic Foramtion of Five-membered Zirconacycloallenoids and Their Reaction with Carbon Dioxide", S. K. Podiyanachari, G. Bender, G. Kehr, C. G. Daniliuc, G. Erker, Organometallics 2014, 33, 3481-3488.  doi: 10.1021/om500399w.

"Reaction of five-membered zirconacycloallenoids with the strong Lewis acid B(C6F5)3", G. Bender, C. G. Daniliuc, B. Wibbeling, G. Kehr, G. Erker, Dalton Trans. 2014, 43, 12210-12213.  doi: 10.1039/c4dt01137f.

"Solid-state NMR strategies for the structural characterization of paramagnetic NO adducts of Frustrated Lewis Pairs (FLPs)", T. Wiegand, M, Sajid, G. Kehr, G. Erker, H. Eckert, Solid State Nucl. Magn. Reson. 2014, 61-62, 19-27.  doi: 10.1016/j.ssnmr.2014.04.001.

"Solid-state NMR studies for the determination of 11B electric field-gradient tensor orientations in P/B Frustrated Lewis Pairs and related systems", T. Wiegand, M. Siedow, O. Ekkert, J. Möbus, C. G. Daniliuc, G. Kehr, G. Erker, H. Eckert, Solid State Nucl. Magn. Reson. 2014, asap. doi: 10.1016/j.ssnmr.2014.03.002.

"Formation of a dihydroborole by catalytic isomerization of a divinylborane", R. A. Adler Yañez, G. Kehr, C. G. Daniliuc, B. Schirmer, G. Erker, Dalton Trans. 2014, 43, 10794-10800. doi: 10.1039/c4dt01423e.

"Frustrated Lewis Pair Modification by 1,1-Carboboration: Disclosure of a Remarkable Phosphine Oxide Triggered Nitrogen Monoxide Addition to an Intramolecular P/B Frustrated Lewis Pair", R. Liedtke, F. Scheidt, J. Ren, B. Schirmer, A. J. P. Cardenas, C. G. Daniliuc, H. Eckert, T. H. Warren, S. Grimme, G. Kehr, G. Erker, J. Am. Chem. Soc. 2014, 136, 9014-9027. doi: 10.1021/ja5028293.

"Formation of Allenes by 1,4-Addition of Intermolecular Phosphane/Borane Frustrated Lewis Pairs to a Conjugated Enyne", P. Feldhaus, B. Wibbeling, R. Fröhlich, C. G. Daniliuc, G. Kehr, G. Erker, Synlett 2014, 25, 1529-1553. doi: 10.1055/s-0033-1341071.

"Borole Formation by 1,1-Carboboration", F. Ge, G. Kehr, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2014, 136, 68-71. doi: 10.1021/ja4110396.

"Indirect “No-Bond” 31P···31P Spin-Spin Couplings in P,P-[3]Ferrocenophanes: Insights from Solid-State NMR Spectroscopy and DFT calculations", T. Wiegand, H. Eckert, J. Ren, G. Brunklaus, R. Fröhlich, C. G. Daniliuc, G. Lübbe, K. Bussmann, G. Kehr, G. Erker, S. Grimme, J. Phys. Chem. A. 2014, 118, 2316–2331. doi: 10.1021/jp500172b.

"The B(C6F5)3 Boron Lewis Acid Route to Arene-Annulated Pentalenes", C. Chen, M. Harhausen, A. Fukazawa, S. Yamaguchi, R. Fröhlich, C. G. Daniliuc, J. L. Petersen, G. Kehr, G. Erker, Chem. Asian J. 2014, 9, 1671-1681. doi: 10.1002/asia.201400096.

G. Kehr and G. Erker (2014) ‘Ferrocenes in frustrated Lewis pair chemistry’ in The Chemistry of Organoiron Compounds, edited by I. Marek and Z. Rappoport. John Wiley & Sons, Ltd: Chichester, UK, pp. 233-247. doi: 10.1002/9780470682531.pat0661.

"The frustrated Lewis pair pathway to methylene phosphonium systems", Y. Hasegawa, G. Kehr, S. Ehrlich, S. Grimme, C. G. Daniliuc, G. Erker, Chem. Sci. 2014, 5, 797-803. doi: 10.1039/c3Sc52327f.

"Borata-alkene derivatives conveniently made by frustrated Lewis pair chemistry", J. Möbus, G. Kehr, C. G. Daniliuc, R. Fröhlich, G. Erker, Dalton Trans. 2014, 43, 632-638. doi: 10.1039/c3dt52373j.

"Internal Adduct Formation of Active Intramolecular C4-bridged Frustrated Phosphane/Borane Lewis Pairs", X. Wang, G. Kehr, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2014, 136, 3293-3303. doi: 10.1021/ja413060u.

"Formylborane Formation by Frustrated Lewis Pair Templates", M. Sajid, G. Kehr, C. G. Daniliuc, G. Erker, Angew. Chem. 2014, 126, 1136-1139. doi: 10.1002/ange.201307551; "Formylborane Formation by Frustrated Lewis Pair Templates", M. Sajid, G. Kehr, C. G. Daniliuc, G. Erker, Angew. Chem. Int. Ed. 2014, 53, 1118-1121. doi: 10.1002/anie.201307551.

"Reaction of a Bridged Frustrated Lewis Pair with Nitric Oxide: A Kinetic Study", J. C. M. Pereira, M. Sajid, G. Kehr, A. M. Wright, B. Schirmer, Z.-W. Qu, S. Grimme, G. Erker, P. C. Ford, J. Am. Chem. Soc. 2014, 136, 513-519. doi: 10.1021/ja4118335.

"A Phoshino Calix[4]arene Bis-Frustrated Lewis Pair", G. E. Arnott, P. Moquist, C. G. Daniliuc, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2014, 1394-1398. doi: 10.1002/ejic.201301529.

"Ethene/alkyne exchange reaction at an intramolecular frustrated Lewis pair", C. Eller, K. Bussmann, G. Kehr, B. Wibbeling, R. Fröhlich, C. G. Daniliuc, G. Erker, Chem. Commun. 2014, 50, 1980-1982. doi: 10.1039/c3cc47769j.

"Thymine and Adenine Tetrads Formed on Anisotropic Metal Surfaces", D. Zhong, T. Blömker, C. Mück-Lichtenfeld, H. Zhang, G. Kehr, G. Erker, H. Fuchs, L. Chi, Small 2014, 10, 265-270. doi: 10.1002/smll.201301595.

2013



"Reactions of (Diphenylphosphinomethyl)zirconocene Chloride with B(C6F5)3: Competition Between P/B and P/Zr+ Frustrated Lewis Pair Reactions", X. Xu, G. Kehr, C. G. Daniliuc, G. Erker, Organometallics 2013, 32, 7306-7311. doi: 10.1021/om400769y.

"Carbonylation Reactions of Intramolecular Vicinal Frustrated Phosphane/Borane Lewis Pairs", M. Sajid, A. Lawzer, W. Dong, C. Rosorius, W. Sander, B. Schirmer, S. Grimme, C. G. Daniliuc, G. Kehr, G. Erker, J. Am. Chem. Soc. 2013, 135, 18567-18574. doi: 10.1021/ja408815k.

"An Enamine/HB(C6F5)2 Adduct as a Dormant State in Frustrated Lewis Pair Chemistry", B.-H. Xu, K. Bussmann, R. Fröhlich, C. G. Daniliuc, J. G. Brandenburg, S. Grimme, G. Kehr, G. Erker, Organometallics 2013, 32, 6745-6752. doi: 10.1021/om4004225.

"Remarkable Behavior of a Bifunctional Alkynylborane Zirconocene Complex toward Donor Ligands and Acetylenes", S. K. Podiyanachari, G. Kehr, C. Mück-Lichtenfeld, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2013, 135, 17444-17456. doi: 10.1021/ja408385h.

"Temperature-Dependent Self-Assembly of Adenine Derivative on HOPG", Z. Mu, O. Rubner, M. Bamler, T. Blömker, G. Kehr, G. Erker, A. Heuer, H. Fuchs, L. Chi, Langmuir 2013, 29, 10737-10743. doi: 10.1021/la401974t.

"Reaction of Diphenylphosphinoacetylene with RB(C6F5)2 Reagents: Evidence for a Remarkable Sequence of Synergistic Frustrated Lewis Pair Addition Reactions", J. Yu, G. Kehr, C. G. Daniliuc, G. Erker, Inorg. Chem. 2013, 52, 11661-11668. doi: 10.1021/ic402139g.

"Reactions of dimethylzirconocene complexes with a vicinal frustrated P/B Lewis pair", S. Frömel, G. Kehr, R. Fröhlich, C. G. Daniliuc, G. Erker, Dalton Trans. 2013, 42, 14531-14536. doi: 10.1039/c3dt52128a.

"Formation and structual characterization of a five-membered zirconacycloallenoid", G. Bender, G. Kehr, C. G. Daniliuc, B. Wibbeling, G. Erker, Dalton Trans. 2013, 42, 14673-14676. doi: 10.1039/c3dt51497h.

"Structural features and reactions of a geminal frustrated phosphane/borane Lewis pair", C. Rosorius, C. G. Daniliuc, R. Fröhlich, G. Kehr, G. Erker, J. Organomet. Chem. 2013, 744, 149-155. doi: 10.1016/j.jorganchem.2013.06.005.

"Reaction of strongly electrophilic alkenylboranes with phosphanylalkynes: rare examples of intermolecular 1,1-alkenylboration reactions", O. Ekkert, O. Tuschewitzki, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Commun 2013, 49, 6992-6994. doi: 10.1039/C3CC43294G.

"Facile 1,1-Carboboration Reaction of a Diarylphosphino-substituted Conjugated Diyne with Tris(pentafluorophenyl)borane", P. Feldhaus, G. Kehr, R. Fröhlich, C. G. Daniliuc, G. Erker, Z. Naturforsch. 2013, 68b, 666-674. doi: 10.5560/ZNB.2013-3088.

"A Unique Frustrated Lewis Pair Pathway to Remarkably Stable Borata-Alkene Systems", J. Yu, G. Kehr, C. G. Daniliuc, G. Erker, Eur. J. Inorg. Chem. 2013, 3312-3315. doi: 10.1002/ejic.201300520.

"1,1-Carbozirconation: Unusual Reaction of an Alkyne with a Methyl Zirconocene Cation and Subsequent Frustrated Lewis Pair Like Reactivity", X. Xu, G. Kehr, C. G. Daniliuc, G. Erker, Angew. Chem. 2013, 125, 13874-13877 doi: 10.1002/ange.201307493; "1,1-Carbozirconation: Unusual Reaction of an Alkyne with a Methyl Zirconocene Cation and Subsequent Frustrated Lewis Pair Like Reactivity", X. Xu, G. Kehr, C. G. Daniliuc, G. Erker, Angew. Chem. Int. Ed. 2013, 52, 13629-13632 doi: 10.1002/anie.201307493.

"Dibenzopentalenes from B(C6F5)3-Induced Cyclization Reactions of 1,2−Bis(phenylethynyl)benzenes", C. Chen, M. Harhausen, R. Liedtke, K. Bussmann, A. Fukazawa, S. Yamaguchi, J. L. Petersen, C. G. Daniliuc, R. Fröhlich, G. Kehr, G. Erker, Angew. Chem. 2013, 125, 6108-6112. doi: 10.1002/ange.201300871. "Dibenzopentalenes from B(C6F5)3-Induced Cyclization Reactions of 1,2−Bis(phenylethynyl)benzenes", C. Chen, M. Harhausen, R. Liedtke, K. Bussmann, A. Fukazawa, S. Yamaguchi, J. L. Petersen, C. G. Daniliuc, R. Fröhlich, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2013, 52, 5992-5996. doi: 10.1002/anie.201300871.

"Electronic control in frustrated Lewis pair chemistry: adduct formation of intramolecular FLP systems with –P(C6F5)2 Lewis base components", A. Stute, G. Kehr, C. G. Daniliuc, R. Fröhlich, G. Erker, Dalton Trans. 2013, 42, 4487-4499. doi: 10.1039/C2DT32806B.

"Unusual Pathway Taken in the Reaction of Bis(alkynyl)diisopropylaminoboranes with B(C6F5)3", F. Ge, G. Kehr, C. G. Daniliuc, G. Erker, Chem. Asian J. 2013, 8, 2227-2234. doi: 10.1002/asia.201300536.

"Reactions of a Cationic Geminal Zr+/P Pair with Small Molecules", X. Xu, G. Kehr, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2013, 135, 6465-6476. doi: 10.1021/ja3110076.

"Facile 1,1-Carboboration Reactions of Acetylenic Thioethers", C. Eller, C. G. Daniliuc, R. Fröhlich, G. Kehr, G. Erker, Organometallics 2013, 32, 384-386. doi: 10.1021/om400016t.

"Facile Carbon Monoxide Reduction at Intramolecular Frustrated P/B Lewis Pair Templates", M. Sajid, L.-M. Elmer, C. Rosorius, C. G. Daniliuc, S. Grimme, G. Kehr, G. Erker, Angew. Chem. 2013, 125, 2299-2302. (hot paper). doi: 10.1002/ange.201208750. "Facile Carbon Monoxide Reduction at Intramolecular Frustrated P/B Lewis Pair Templates", M. Sajid, L.-M. Elmer, C. Rosorius, C. G. Daniliuc, S. Grimme, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2013, 52, 2243-2246. (hot paper). doi: 10.1002/anie.201208750.

"Intramolecular Frustrated Lewis Pairs: Formation, Structural and Chemical Features", G. Kehr, S. Schwendemann, G. Erker, Top. Curr. Chem. 2013, 332, 45-83. doi: 10.1007//128_2012_373.

"Functional group chemistry at intramolecular frustrated Lewis pairs: substituent exchange at the Lewis acid site with 9-BBN", M. Erdmann, C. Rösener, T. Holtrichter-Rößmann, C. G. Daniliuc, R. Fröhlich, W. Uhl, E.-U. Würthwein, G. Kehr, G. Erker, Dalton Trans. 2013, 42, 709-718. doi: 10.1039/c2dt31737k.

"Reactions of phosphorus/boron frustrated Lewis pairs with SO2", M. Sajid, A. Klose, B. Birkmann, L. Liang, B. Schirmer, T. Wiegand, H. Eckert, A. J. Lough, R. Fröhlich, C. G. Daniliuc, S. Grimme, D. W. Stephan, G. Kehr, G. Erker, Chem. Sci. J. 2013, 4, 213-219. doi: 10.1039/c2sc21161k.

"Noninteracting, Vicinal Frustrated P/B-Lewis Pair at the Norbornane Framework: Synthesis, Characterization and Reactions", M. Sajid, G. Kehr, T. Wiegand, H. Eckert, C. Schwickert, R. Pöttgen, A. J. P. Cardenas, T. H. Warren, R. Fröhlich, C. G. Daniliuc, G. Erker, J. Am. Chem. Soc. 2013, 135, 8882-8895. doi: 10.1021/ja400338e.

"Ferrocenes in Frustrated Lewis Pair Chemistry", G. Kehr, G. Erker, Patai's Chemistry of Functional Groups 2013. doi: 10.1002/9780470682531.pat0661.

"Reaction of Unsaturated Vicinal Phosphane/Borane Frustrated Lewis Pairs with Benzaldehyde", O. Ekkert, G. Kehr, C. G. Daniliuc, R. Fröhlich, B. Wibbeling, J. L. Petersen, G. Erker, Z. Anorg. Allg. Chem. 2013, 639, 2455-2462 doi: 10.1002/zaac.201300421.doi: 10.1002/zaac.201300421).

"Reaction of an „Invisible“ Frustrated N/B Lewis Pair with Dihydrogen", S. Schwendemann, S. Oishi, S. Saito, R. Fröhlich, G. Kehr, G. Erker, Chem. Asian J. 2013, 8, 212-217. doi: 10.1002/asia.201200776.

"Remarkable coordination behavior of alkyl isocyanides toward unsaturated vicinal frustrated P/B Lewis pairs", O. Ekkert, G. González Miera, T. Wiegand, H. Eckert, B. Schirmer, J. L. Petersen, C. G. Daniliuc, R. Fröhlich, S. Grimme, G. Kehr, G. Erker, Chem. Sci. 2013, 4, 2657-2664. doi: 10.1039/C3SC00082F.

2012


"Carboboration Reactions of 1,2-Bis((diarylphosphino)ethynyl)benzenes with Tris(pentafluorophenyl)-borane", R. Liedtke, G. Kehr, R. Fröhlich, C. G. Daniliuc, B. Wibbeling, J. L. Petersen, G. Erker, Helv. Chim. Acta 2012, 95, 2515-2527. doi: 10.1002/hlca.201200495.

"Anomalous Staudinger reaction at intramolecular frustrated P-B Lewis Pair frameworks", A. Stute, L. Heletta, R. Fröhlich, C. G. Daniliuc, G. Kehr, G. Erker, Chem. Commun. 2012, 48, 11739-11741. doi: 10.1039/c2cc36782c.

"Chemistry of the five-membered zirconacycloallenoids: reactions with unsaturated substrates", G. Bender, G. Kehr, R. Fröhlich, J. L. Petersen, G. Erker, Chem. Sci. 2012, 3, 3534-5340. doi: 10.1039/c2sc20745a.

"Facile formation of five-membered N-heterocyclic zirconacycloallenoids", S. K. Podiyanachari, R. Fröhlich, C. G. Daniliuc, J. L: Petersen, G. Kehr, G. Erker, N. Suzuki, S. Yuasa, K. Hagimori, S. Inoue, T. Asada, T. Takemoto, Y. Masuyama, Dalton Trans. 2012, 41, 10811-10816. doi: 10.1039/c2dt31343j.

"Binding of Molecular Magnesium Hydrides to a Zirconocene-Enyne Template", G. Bender, T. Wiegand, H. Eckert, R. Fröhlich, C. G. Daniliuc, C. Mück-Lichtenfeld, S. Ndambuki, T. Ziegler, G. Kehr, G. Erker, Angew. Chem. 2012, 124, 8976-8979. doi: 10.1002/ange.201203372. "Hydrogen Activation by an Intramolecular Boron Lewis Acid/Zirconocene Pair", S. K. Podiyanachari, R. Fröhlich, C. G. Daniliuc, J. L. Petersen, C. Mück-Lichtenfeld, G. Kehr, G. Erker, Angew. Chem. 2012, 51, 8846-8849. doi: 10.1002/anie.201203372.

"Hydrogen Activation by an Intramolecular Boron Lewis Acid/Zirconocene Pair", S. K. Podiyanachari, R. Fröhlich, C. G. Daniliuc, J. L. Petersen, C. Mück-Lichtenfeld, G. Kehr, G. Erker, Angew. Chem. 2012, 124, 8960-8963. doi: 10.1002/ange.201202218. "Hydrogen Activation by an Intramolecular Boron Lewis Acid/Zirconocene Pair", S. K. Podiyanachari, R. Fröhlich, C. G. Daniliuc, J. L. Petersen, C. Mück-Lichtenfeld, G. Kehr, G. Erker, Angew. Chem. 2012, 51, 8830-8833. doi: 10.1002/anie.201202218.

"Splitting of dihydrogen by five-membered zirconacycloallenoids: a novel pathway to conjugated diene zirconocene complexes", G. Bender, G. Kehr, C. G. Daniliuc, Q. M. Dao, S. Ehrlich, S. Grimme, G. Erker, Chem. Commun. 2012, 48, 11085-11087. doi: 10.1039/c2cc36189b.

"Reversible Heterolytic Si–H Bond Activation by an Intramolecular Frustrated Lewis Pair", W. Nie, H. F. T. Klare, M. Oestreich, R. Fröhlich, G. Kehr, G, Erker, Z. Naturforsch. 2012, 67b, 987-994. doi: 10.5560/znb.2012-0181.

"Reactions of a methylzirconocene cation with phosphinoalkynes: an alternative pathway for generating Cp2Zr(II) systems", X. Xu, R. Fröhlich, C. G. Daniliuc, G. Kehr, G Erker, Chem. Commun. 2012, 48, 6109-6111. doi: 110.1039/C2CC31883K.

"Alkenylborane-Derived Frustrated Lewis Pairs: Metal-Free Catalytic Hydrogenation Reactions of Electron-Deficient Alkenes", J. Sreedhar Reddy, B.-H. Xu, T. Mahdi, R. Fröhlich, G. Kehr, D. W. Stephan, G. Erker, Organometallics 2012, 31, 5638-5649. doi: 10.1021/om3006068.

"("Ferrocene-salaldiminato")zirconium Complexes for Ethylene Polymerization Catalysis: The Role of the Bulky Substituents", X. Wang, R. Fröhlich, C. G. Daniliuc, B. Rieger, A. Jonovic, G. Kehr, G. Erker, Organometallics 2012, 31, 6741-6752. doi: 10.1021/om3004509.

"N,N-Addition of Frustrated Lewis Pairs to Nitric Oxide: An Easy Entry to a Unique Family of Aminoxyl Radicals", M. Sajid, A. Stute, A. J. P. Cardenas, B. J. Culotta, J. A. M. Hepperle, T. H. Warren, B. Schirmer, S. Grimme, A. Studer, C. G. Daniliuc, R. Fröhlich, J. L. Petersen, G. Kehr, G. Erker, J. Am. Chem. Soc. 2012, 134, 10156-10168. doi: 10.1021/ja302652a.

"1,1-Carboboration Route to Substituted Naphthalenes", R. Liedtke, M. Harhausen, R. Fröhlich, G. Kehr, G. Erker, Org. Lett. 2012, 14, 1448-1451. doi: 10.1021/ol300193e.

"Halogen Addition to a Frustrated Lewis Pair", S. Frömel, R. Fröhlich, C. G. Daniliuc, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2012, 3774-3779. doi: 10.1002/ejic.201200288.

"Propylene Polymerization with α-Keto-β-Diimine Initiators Proceeds via Enantiomorphic Site Control", J. D. Azoulay, H. Gao, Z. A. Koretz, G. Kehr, G. Erker, F. Shimizu, G. B. Galland, G. C. Bazan, Macromolecules 2012, 45, 4487-4493. doi: 10.1021/ma300504j.

"Reactions of Modified Intermolecular Frustrated P/B Lewis Pairs with Dihydrogen, Ethene and Carbon Dioxide", M. Harhausen, R. Fröhlich, G. Kehr, G. Erker, Organometallics 2012, 31, 2801-2809. doi: 10.1021/om201076f.

"Double arylation of acetylene dicarboxylate with B(C6F5)3", H. Nakatsuka, R. Fröhlich, M. Kitamura, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2012, 47, 1163-1166. doi: 10.1002/ejic.201101413.

"Frustrated Lewis Pair Addition to Conjugated Diynes: Formation of Zwitterionic 1,2,3-Butatriene Derivatives", P. Feldhaus, B. Schirmer, B. Wibbeling, C. G. Daniliuc, R. Fröhlich, S. Grimme, G. Kehr, G. Erker, Dalton Trans 2012, 41, 9135-9142. doi: 10.1039/C2DT30321C.

"Preparation of Dihydroborole Derivatives by a Simple 1,1-Carboboration Route", A. Feldmann, A. Iida, R. Fröhlich, S. Yamaguchi, G. Kehr, G. Erker, Organometallics 2012, 31, 2445-2451. doi: 10.1021/om300065m.

"New Insights into Frustrated Lewis Pairs: Structural Investigations of Intramolecular Phosphane–Borane Adducts by Using Modern Solid-State NMR Techniques and DFT Calculations", T. Wiegand, H. Eckert, O. Ekkert, R. Fröhlich, G. Kehr, G. Erker, S. Grimme, J. Am. Chem. Soc. 2012, 134, 4236-4249. doi: 10.1021/ja210160k.

"Die 1,1-Carboborierung von Bis(alkinyl)phosphanen als Zugang zum Phospholgerüst", J. Möbus, Q. Bonnin, K. Ueda, R. Fröhlich, K. Itami, G. Kehr, G. Erker, Angew. Chem. 2012, 124, 1990-1993. doi: 10.1002/ange.201107398; "The 1,1-Carboboration of Bis(alkynyl)phosphanes as a Route to Phosphole Compounds", J. Möbus, Q. Bonnin, K. Ueda, R. Fröhlich, K. Itami, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2012, 51, 1954-1957. doi: 10.1002/anie.201107398.

"1,1-Carboboration", G. Kehr, G. Erker, Chem. Commun. 2012, 48, 1839-1850. doi: 10.1039/c1cc15628d.

"Frustrated Lewis Pair Behavior of Intermolecular Amine/B(C6F5)3 Pairs", T. Voss, T. Mahdi, E. Otten, R. Fröhlich, G. Kehr, D. W. Stephan, G. Erker, Organometallics 2012, 31, 2367-2378. doi: 10.1021/om300017u.

"Reaction of Frustrated Lewis Pairs with Ketones and Esters", B.-H. Xu, R. A. Adler Yanez, H. Nakatsuka, M. Kitamura, R. Fröhlich, G. Kehr, G. Erker, Chem. Asian J. 2012, 7, 1347-1356. doi: 10.1002/asia.201100960.

"Reaction of a 6-Dimethylaminopentafulvene with the Mes2P-CH2CH2-B(C6F5)2 Frustrated Lewis Pair", B.-H. Xu, C. M. Mömming, G. Kehr, R. Fröhlich, G. Erker, Chem. Eur. J. 2012, 18, 1826-1830. doi: 10.1002/chem.201101937.

"Synthesis of [(π-cyano-P-nacnac)Cp] and [(π-cyano-nacnac)Cp]-zirconium Complexes, and their Remote Activation for Ethylene Polymerization", R. S. Rojas, A. R. Cabrera, B. C. Peoples, K. Spannhoff, M. Valderrama, R. Fröhlich, G. Kehr, G. Erker, Dalton Trans. 2012, 41, 1243-1251. doi: 10.1039/C1DT11261A.

2011


"6-Dimethylaminopentafulvene as Lewis Base Component in Frustrated Lewis Pairs: Reversible Carbon-Carbon Coupling in FLP Chemistry", B.-H. Xu, G. Kehr, R. Fröhlich, G. Erker, Organometallics 2011, 30, 5080-5083.

"o-Diarylphosphinoferrocene Sulfonate Palladium Systems for Nonalternating Ethene-Carbon Monoxide Copolymerization", C. Chen, T. M. J. Anselment, R. Fröhlich, B. Rieger, G. Kehr, G. Erker, Organometallics 2011, 30, 5248-5257.

"Dichlorocobalt(II) Complexes Ligated by Bidentate 8-(Benzoimidazol-2-yl)quinolines: Synthesis, Characterization, and Catalytic Behavior towards Ethylene", T. Xiao, P. Hao, G. Kehr, X. Hao, G. Erker, W.-H. Sun, Organometallics 2011, 30, 4847-4853.

"Phosphirenium borate zwitterion: formation in the 1,1 carboboration reaction of phosphinylalkynes", O. Ekkert, G. Kehr, R. Fröhlich, G. Erker, Chem. Commun. 2011, 47, 10482-10484.

"Frustrated Lewis Pair Reactions With Bis-Acetylenic Substrates: Exploring the Narrow Gap Separating Very Different Competing Reaction Pathways", R. Liedtke, R. Fröhlich, G. Kehr, G. Erker, Organometallics 2011, 30, 5222-5232.

"Electronic Control of Frustrated Lewis Pair Behavior: Chemistry of a Geminal Alkylidene-bridged Per-pentafluorophenylated P/B Pair", C. Rosorius, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, Organometallics 2011, 30, 4211-4219.

"Bidentate Iron(II) Dichloride Complexes Bearing 8-(Benzoimidazol-2-yl)quinolines: Synthesis, Characterization, and Ethylene Polymerization Behavior", T. Xiao, S. Zhang, G. Kehr, X. Hao, G. Erker, W.-H. Sun, Organometallics 2011, 30, 3658-3665.

"Linear Alkane Polymerization on a Gold Surface", D. Zhong, J.-H. Franke, S. K. Podiyanachari, T. Blömker, H. Zhang, G. Kehr, G. Erker, H. Fuchs, L. Chi, Science 2011, 334, 213-216.

"Synthesis and Structure of Bifunctional Zirconocene/Borane Complexes and their Activation for Ethylene Polymerization", R. S. Rojas, B. C. Peoples, A. R. Cabrera, M. Valderrama, R. Fröhlich, G. Kehr, G. Erker, T. Wiegand, H. Eckert, Organometallics 2011, 30, 6372-6382.

"Reaktionen frustrierter Lewis-Paare mit konjugierten Inonen - selektive Hydrierung der Kohlenstoff-Kohlenstoff-Dreifachbindung", B.-H. Xu, G. Kehr, R. Fröhlich, B. Wibbeling, B. Schirmer, S. Grimme, G Erker, Angew. Chem. 2011, 123, 7321-7324; "Reaction of Frustrated Lewis Pairs with Conjugated Ynones - Selective Metal-Free Hydrogenation of the Carbon-Carbon Triple Bond", B.-H. Xu, G. Kehr, R. Fröhlich, B. Wibbeling, B. Schirmer, S. Grimme, G Erker, Angew. Chem. Int. Ed. 2011, 50, 7183-7186.

"Capture of NO by a Frustrated Lewis Pair: A New Type of Persistent N-Oxyl Radical", A. J. P. Cardenas, B. J. Culotta, T. H. Warren, S. Grimme, A. Stute, R. Fröhlich, G. Kehr, G. Erker, Angew. Chem. 2011, 123, 7709-7713; "Capture of NO by a Frustrated Lewis Pair: A New Type of Persistent N-Oxyl Radical", A. J. P. Cardenas, B. J. Culotta, T. H. Warren, S. Grimme, A. Stute, R. Fröhlich, G. Kehr, G. Erker, Angew. Chem. Int. Ed. 2011, 50, 7567-7571.

"Intramolecular Frustrated N / B Lewis Pairs: Structural Features and Chemistry", S. Schwendemann, R. Fröhlich, G. Kehr, G. Erker, Chem. Sci. 2011, 2, 1842-1849.

"Chemistry of a Geminal Frustrated Lewis Pair featuring Electron Withdrawing C6F5 Substituents at Both Phosphorus and Boron", A. Stute, G. Kehr, R. Fröhlich, G. Erker, Chem. Commun. 2011, 47, 4288-4290.

"CO2 and Formate Complexes of Phosphine/Borane Frustrated Lewis Pairs", I. Peuser, R. C. Neu, X. Zhao, M. Ulrich, B. Schirmer, J. A. Tannert, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, D. W. Stephan, Chem. Eur. J. 2011, 17, 9640-9650.

"Reactions of Topologically Related “nacnacH-CN” and “P-nacnacH-CN” Chelate Ligand Systems with HB(C6F5)2", K. Spannhoff, R. Rojas, R. Fröhlich, G. Kehr, G. Erker, Organometallics 2011, 30, 2377-2384.

"1,1-Carboboration of 1-Alkynes: A Conceptional Alternative to the Hydroboration Reaction", C. Chen, T. Voss, R. Fröhlich, G. Kehr, G. Erker, Org. Lett. 2011, 13, 62-65.

"P-C Bond Activation Chemistry: Evidence for 1,1-Carboboration Reactions Proceeding with Phosphorous-Carbon Bond Cleavage", O. Ekkert, R. Fröhlich, G. Kehr, G. Erker, J. Am. Chem. Soc. 2011, 133, 4610-4616.

"The Frustrated Lewis Pair Induced Formation of a Pentafulvene [6+4] Cycloaddition Product", C- Mömming, G. Kehr, R. Fröhlich, G. Erker, Chem. Commun. 2011, 47, 2006-2007.

"Unusual Carbamate-directed CH-Activation at an Anellated Ferrocenophane Framework", T. Voss, R. Fröhlich, G. Kehr, G. Erker, Dalton Trans. 2011, 40, 6984-6991.

"Remarkable Structual Variety of Bis(diphenylphosphino)[3]ferrocenophane Gold(I) Complexes", G. Lübbe, G. Kehr, R. Fröhlich, G. Erker, Inorg. Chim. Acta 2011, 369, 223-230.

"Reactions of Bis(alkynyl)silanes with HB(C6F5)2: Formation of Boryl-substituted Silacyclobutene Derivates", J. Ugolotti, G. Dierker, R. Fröhlich, G. Kehr, G. Erker, J. Organomet. Chem. 2011, 696, 1184-1188.

"Reaction of Aminodihydropentalenes with HB(C6F5)2 - The Crucial Role of Dihydrogen Elimination", B.-H. Xu, G. Kehr, R. Fröhlich, S. Grimme. G. Erker, J. Am. Chem. Soc. 2011, 133, 3480-3491.

"Synthesis of [3]ferrocenophane-bridged Cp-amido zirconium complexes and ansa-zirconocene complexes and their use in catalytic polymerisation reactions", K. Unverhau, G. Kehr, R. Fröhlich, G. Erker, Dalton Trans. 2011, 40, 3724-3736.

"Alkene Addition of Frustrated P/B and N/B Lewis Pairs at the [3]Ferrocenophane Framework", T. Voss, J. B. Sortais, R. Fröhlich, G. Kehr, G. Erker, Organometallics 2011, 30, 584-594.

2010


"Frustrated Lewis Pairs and Ring Opening of THF, Dioxane, and Thioxane", B. Birkmann, T. Voss, S. J. Geier, M. Ullrich, G. Kehr, G. Erker, D. W. Stephan, Organometallics 2010, 29, 5310-5319.

"Frustrated Lewis Pair Reactions at the [3]Ferrocenophane Framework", K. Unverhau, G. Lübbe, B. Wibbeling, R. Fröhlich, G. Kehr, G. Erker, Organometallics 2010, 29, 5320-5329.

"Carbon-Carbon Bond Cleavage by Strongly Electrophilic Boranes", B.-H. Xu, G. Kehr, R. Fröhlich, G. Erker, Chem. Eur. J. 2010, 16, 12538-12540.

“Zirconocene Complexes Bearing Novel 3-Dimethylamino-1,2-dihydropentalene Derived Ligand Systems”, B.-H. Xu, G. Kehr, R. Fröhlich, E. Nauha, G. Erker, Dalton Trans., 2010, DOI:10.1039/C0DT00515K.

"Electronic Tuning of Thiazolyl-Capped -Conjugated Compounds via a Coordination/Cyclization Protocol with B(C6F5)3", A. Job, A. Wakamiya, G. Kehr, G. Erker, S. Yamaguchi, Org. Lett. 2010, 12, 5470-5473.

"Fullerene-Mediated Activation of Dihydrogen: A New Method of Metal-Free Catalytic Hydrogenation", J. Niemeyer, G. Erker, ChemCatChem. 2010, 2, 499-500.

"Developing a Reliable Synthetic Route to cis-1,3-Bridge Disubstituted [3]Ferrocenophane Systems", C. Usener, G. Kehr, R. Fröhlich, B. Wibbeling, C. Mück-Lichtenfeld, G. Erker, Organometallics 2010, 29, 3852-3861.

"Carbon-Carbon Bond Activation by 1,1-Carboboration of Internal Alkynes", C. Chen, G. Kehr, R. Fröhlich, G. Erker, J. Am. Chem. Soc 2010, 132, 13594–13595.

"Zirconocene Functional Group Chemistry: Photochemical [4+4] Cycloaddition of Isoprenyl Sidechains to the Bent Metallocene Framework", I. Greger, G. Kehr, G. Erker, Eur. J. Inorg. Chem 2010, 5, 2199 – 2208.

“Dynamic Topochemical Reaction Control - A Principle and its Application in ansa-Metallocene Synthesis”, I. Greger, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2010, 29, DOI: 10.1021/om100467y.

"Exploring the Limits of Frustrated Lewis Pair Chemistry with Alkynes: Detection of a System that Favors 1,1-Carboboration over Cooperative 1,2-P/B-Addition", C. Chen, F. Eweiner, B. Wibbeling, R. Fröhlich, S. Senda, Y. Ohki, K. Tatsumi, S. Grimme, G. Kehr, G. Erker Chem. Asian J. 2010, 4711–4715.

"Structure and Dynamic Features of a Frustrated Lewis Pair", K. Axenov, C. M. Mömming, G. Kehr, R. Fröhlich, G. Erker, Chem. Eur. J. 2010, 16, 14069-14073.

"Salen-ligands based on a planar-chiral hydroxyferrocene moiety: Synthesis, coordination chemistry and use in asymmetric silylcyanation", J. Niemeyer, J. Cloppenburg, R. Fröhlich, G. Kehr, G.Erker J. Organomet. Chem 2010, 695, 1801-1812.

“Cyclizations via Frustrated Lewis Pairs: Lewis Acid Induced Intramolecular Additions of Amines to Olefins and Alkynes”, T. Voss, C. Chen, G. Kehr, E. Nauha, G. Erker, D. W. Stephan, Chem. Eur. J., 2010, 16, 3005-3008.

“Photochemical Isomerisation of Boryl-Substituted Silole Derivatives”, J. Ugolotti, G. Kehr, R. Fröhlich, G. Erker, Chem. Commun., 2010, 46, 3016-3018.

“Remarkably Variable Reaction Modes of Frustrated Lewis Pairs with Non-Conjugated Terminal Diacetylenes”, C. Chen, R. Fröhlich, G. Kehr, G. Erker, Chem. Commun., 2010, 46, 3580-3582.

“Cyclische Allene und Cumulene durch kooperative Addition frustrierter Lewis-Paare an konjugierte Enine und Diine, C. M. Mömming, G. Kehr, B. Wibbeling, R. Fröhlich, B. Schirmer, S. Grimme, G. Erker,, Angew. Chem., 2010, 122, 2464-2467; “Formation of Cyclic Allene and Cumulene by Cooperative Addition of Frustrated Lewis Pairs to Conjugated Enynes and Diynes”,C. M. Mömming, G. Kehr, B. Wibbeling, R. Fröhlich, B. Schirmer, S. Grimme, G. Erker, Angew. Chem. Int. Ed., 2010, 49, 2414-2417.

“Reaction of a Stable Conjugated Primary Enamine with Piers' Borane”, I. Peuser, R. Fröhlich, G. Kehr, G. Erker, Eur. J. Inorg. Chem., 2010, 849-853.

“Addition Reactions to the Intramolecular Mesityl2P-CH2-CH2-B(C6F5)2 Frustrated Lewis Pair”, C. M. Mömming, G. Kehr, R. Fröhlich, G. Erker, Dalton Trans., 2010, DOI:10.1039/C0DT00015A.

“Salen-Ligands Revisited: Synthesis and Application of a Planar Chiral 'Ferro-Salen' Ligand”, J. Niemeyer, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem., 2010, 680-684.

“Metal-free Frustrated Lewis Pair Catalyzed 1,4-Hydrogenation of Conjugated Metallocene Dienamines”, S. Schwendemann, T. A. Tumay, K. V. Axenov, I. Peuser, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2010, 29, 1067-1069.

“Functional Group Chemistry at the Group 4 Bent Metallocene Framework: [2+2] Cycloaddition of the Parent Bis(vinyl-Cp/vinyl-Ind)ZrCl2 Systems”, I. Greger, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2010, 29, 860-866.

 

2009


“Ring-closing metathesis of sterically congested functionalized zirconocenes-ethene polymerization catalysts derived from related bridged and open metallocenes”, T. A. Tumay, G. Kehr, R. Fröhlich, G. Erker, Dalton Trans., 2009, 8923-8928.

“Synthesis and Characterization of [3]Ferrocenophane Derived P,P-Chelate Ligand Gold Complexes Featuring an Aurophilic Interaction”, G. Lübbe, G. Kehr, R. Fröhlich, G. Erker, Z. Naturforsch., 2009, 64b, 1413-1422.

“Synthesis of an Amino-Functionalized ansa-Zirconocene by Intramolecular Photochemical Enamine [2+2]Cycloaddition”, T. A. Tumay, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2009, 28, 4513-4518.

“Catalytic hydrogenation of C=O and C=N bonds via heterolysis of H2 mediated by metal-sulfur bonds of rhodium and iridium thiolate complexes”, M. Sakamoto, Y. Ohki, G. Kehr, G. Erker, K. Tatsumi, J. Organomet. Chem., 2009, 694, 2820-2824.

“Evidence for a Rapid Degenerate Hetero-Cope Type Rearrangement in Cp*W(S)2S-CH2-CH=CH2”, F. Eweiner, S. Senda, K. Bergander, C. Mück-Lichtenfeld, R. Fröhlich, G. Kehr, K. Tatsumi, G. Erker, Chem. Asian J., 2009, 4, 1830-1833.

“Synthesis and Reactions of Ferrocenyl-capped Long-chain Alkynes”, T. Blömker, P. Böckmann, G. Kehr, R. Fröhlich, G. Erker, Z. Naturforsch., 2009, 64b, 587-594.

“Remarkable Product Diversity in the 'Self-organized' Reaction of Deprotonated Acetonitrile with Chlorophosphines”, K. Spannhoff, N. Kuhl, G. Kehr, R. Fröhlich, G. Erker, J. Am. Chem. Soc., 2009, 131, 17836-17842.

“Reversible, nicht metallunterstützte Bindung von Kohlendioxid durch frustrierte Lewis-Paare”,S. Grimme, C. M. Mömming, E. Otten, G. Kehr, R. Fröhlich, S. Grimme, D. W. Stephan, G. Erker, Angew. Chem., 2009, 121, 6770-6773; “Reversible Metal-free Carbon Dioxide Binding by Frustrated Lewis Pairs”,C. M. Mömming, E. Otten, G. Kehr, R. Fröhlich, S. Grimme, D. W. Stephan, G. Erker, Angew. Chem. Int. Ed., 2009, 48, 6643-6646.
[A. Pichon, Nature Chemistry 2009, doi:10.1038/nchem.324; FAZ: 25.11.2009; Frustrierte Phosphan-Boran-Lewis-Paare binden an Kohlenstoffdioxid (URL: http://www.organische-chemie.ch/chemie/2009jul/frustration.shtm); Chemie.de]

“Reactions of an Intramolecular Frustrated Lewis Pair with Unsaturated Substrates: Evidence for a Concerted Olefin Addition Reaction”, C. M. Mömming, S. Frömel, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, J. Am. Chem. Soc., 2009, 131, 12280-12289.

“Functional Group Chemistry at the Group 4 Bent Metallocene Frameworks: Formation and "Metal-free" Catalytic Hydrogenation of Bis(imino-Cp)zirconium Complexes”, K. V. Axenov, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2009, 28, 5148-5158.

“Facile Cyclometalation Reactions of Cp-Zirconium Complexes with Weakly Lewis Acidic Pendent Boron Functionalities”, M. Emmert, G. Kehr, R. Fröhlich, G. Erker, Chem. Eur. J., 2009, 15, 8124 - 8127.

“Reaction of Bis(alkynyl)silanes with Tris(pentafluorophenyl)borane: Synthesis of Bulky Silole Derivatives by Means of 1,1-Carboboration under Mild Reaction Conditions”, G. Dierker, J. Ugolotti, G. Kehr, R. Fröhlich, G. Erker, Adv. Synth. Catal., 2009, 351, 1080-1088.

“Catalytic hydrogenation of sensitive organometallic compounds by antagonistic N/B Lewis Pair catalyst systems”, K. V. Axenov, G. Kehr, R. Fröhlich, G. Erker, J. Am. Chem. Soc., 2009, 131, 3454-3455.

“Five-membered Zirconacycloallenoids - Synthesis and Characterization of Members of a Unique Class of Internally Metal-stabilized Bent Allenoid Compounds”, J. Ugolotti, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, J. Am. Chem. Soc., 2009, 131, 1996-2007.

“Bis("ferrocene-saliminato") Group 4 Metal Complexes: Synthesis, Structural Features and Use in Homogenous Ziegler-Natta Polymerization Catalysis”, J. Niemeyer, G. Kehr, R. Fröhlich, G. Erker, Dalton Trans., 2009, 3731-3741.

“Metal-free dihydrogen activation chemistry: structural and dynamic features of intramolecular P/B pairs”, P. Spies, G. Kehr, K. Bergander, B. Wibbeling, R. Fröhlich, G. Erker, Dalton Trans., 2009, 1534-1541.

“Bifunctional Molecular Systems with Pendent Bis(pentafluorophenyl)boryl Groups: From Intramolecular CH-Activation to Heterolytic Dihydrogen Splitting”, M. Hill, C. Herrmann, P. Spies, G. Kehr, K. Bergander, R. Fröhlich, G. Erker, in "Activating Unreactive Substrates: The Role of Secondary Interactions", Ed. C. Bolm, F. E. Hahn, Wiley VCH, Weinheim, Germany 2009, pp 209-230, ISBN: 978-3-527-31823-0.

“Wann bilden wechselwirkende Atome eine chemische Bindung? Spektroskopische und theoretische Analyse an Dideuterophenanthren”,S. Grimme, C. Mück-Lichtenfeld, G. Erker, G. Kehr, H. Wang, H. Beckers, H. Willner, Angew. Chem., 2009, 121, 2629-2633; “When do interacting atoms form a chemical bond? Spectroscopic measurements and theoretical analyses of Dideuterophenanthrene”,S. Grimme, C. Mück-Lichtenfeld, G. Erker, G. Kehr, H. Wang, H. Beckers, H. Willner, Angew. Chem. Int. Ed., 2009, 48, 2592-2595.

“Catalytic Abilities of [(C6F5)2BR] (R = NC4H4 and NC4H8) Deduced from Experimental and Theoretical Charge-Density Investigations”, U. Flierler, D. Leusser, H. Ott, G. Kehr, G. Erker, S. Grimme, D. Stalke, Chem. Eur. J., 2009, 15, 4595-4601.

“Versatile Behavior of Conjugated Diynes with Zirconocene Reactive Species”, S. Bredeau, E. Ortega, G. Delmas, P. Richard, R. Fröhlich, B. Donnadieu, G. Kehr, N. Pirio, G. Erker, P. Meunier, Organometallics, 2009, 28, 181-187.

“Selective Synthesis of the 2-Hydroxyferrocene-aldimine Enantiomers - Extended Planar.Chiral Analogues of the 'Flat' Salicylaldimine Ligand Family”, J. Niemeyer, G. Kehr, R. Fröhlich, G. Erker, Dalton Trans., 2009, 3716-3730.

“1,2-Olefin Addition of a Frustrated Amine/Borane Lewis Pair”, J.-B. Sortais, T. Voss, G. Kehr, R. Fröhlich, G. Erker, Chem. Commun., 2009, 27, 7417-7418.

“Nitrile Insertion into a Boryl-substituted Five-membered Zirconacycloallenoid: Unexpected formation of a Zwitterionic Boratirane Product”, J. Ugolotti, G. Kehr, R. Fröhlich, G. Erker, Chem. Commun., 2009, 27, 6572-6573.

 

2008


“Unsymmetrical Bis(iminoethyl)pyridine Metal Complexes with a Pendant Alkenyl Substituent - Part B: Internal Olefin Coordination to Ruthenium”, C. Wallenhorst, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2008, 27, 6557 - 6564.

“Bis(iminoethyl)pyridine Systems with a Pendant Alkenyl Group - Part A: Cobalt and Iron Complexes and their Catalytic Behavior”, C. Wallenhorst, G. Kehr, H. Luftmann, R. Fröhlich, G. Erker, Organometallics, 2008, 27, 6547 - 6556.

“Mastering the Third Dimension of Salicylaldimine-type Ligand Systems: Development of a Convenient Route to Bis("ferrocene-saliminato")zirconium Chemistry”, J. Niemeyer, G. Kehr, R. Fröhlich, G. Erker, Chem. Eur. J., 2008, 14, 9499-9502.

“Metallfreie katalytische Hydrierung von Enaminen, Iminen und Phosphinoalkenyl-boranen”, P. Spies, S. Schwendemann, S. Lange, G. Kehr, R. Fröhlich, G. Erker, Angew. Chem., 2008, 120, 7654-7657; “Metal-Free Catalytic Hydrogenation of Enamines, Imines and Conjugated Phosphinoalkenylboranes”,P. Spies, S. Schwendemann, S. Lange, G. Kehr, R. Fröhlich, G. Erker, Angew. Chem. Int. Ed., 2008, 47, 7543-7546.

“Heterolytic cleavage of dihydrogen by frustrated Lewis pairs derived from -dimesitylphosphinoferrocenes and B(C6F5)3”, D. P. Huber, S. Tanino, G. Kehr, K. Bergander, R. Fröhlich, Y. Ohki, K. Tatsumi, G. Erker, Organometallics, 2008, 27, 5279-5284.

“Ferrocene-Derived Bioorganometallic Chemistry: Preparation of a [3]Ferrocenophane ?-Amino Acid for Use in Peptide Synthesis”, L. Tebben, K. Bussmann, M. Hegemann, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2008, 27, 4269-4272.

“Quart-Feproline: Synthesis of a Very Rigid [3]Ferrocenophane Derived Artificial Amino Acid”, L. Tebben, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem, 2008, 2654-2658.

“Functionalized phosphorus analogues of the -diketiminato ligand systems: Bis(N-arylphosphinimino)acetonitrile-derived complexes of rhodium and iridium”, K. Spannhoff, G. Kehr, S. Kehr, R. Fröhlich, G. Erker, Dalton Trans., 2008, 3339-3344.

“Chemical Behavior of a Pair of (COD)CpRh and -Ir Complexes with Pendent Peripheral -B(C6F5)2 Groups”, C. Herrmann, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2008, 2328-2336.

“Structural Features of Lithio[3]ferrocenophane Systems Bearing Stabilizing Dimethylamino Substituents”, C. Chen, R. Fröhlich, G. Kehr, G. Erker, Organometallics, 2008, 27, 3248-3253.

“Bis(diphenylphosphino)acetonitrile oxides, -sulfides and -imines: their formation and structural features, and the remarkable structures of two lithiated derivatives”, L. Braun, G. Kehr, R. Fröhlich, G. Erker, Inorg. Chim. Acta, 2008, 361, 1668-1675.

“Reactions of Pendant Boryl Groups at Cp-Metal Complexes: Heterocyclic Ring Annelation at a CpIr-System”, C. Herrmann, G. Kehr, R.. Fröhlich, G. Erker, Eur. J. Inorg. Chem., 2008, 2273-2277.

“Metallacyclische Fünfring-Allenoide: Synthese und Struktur stabiler stark verzerrter cyclischer Allen-Derivate”, J. Ugolotti, G. Dierker, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, Angew. Chem., 2008, 120, 2662-2665; “Five-membered Metallacyclic Allenoids: Synthesis and Structure of Remarkably Stable Strongly Distorted Cyclic Allene Derivatives”, J. Ugolotti, G. Dierker, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, Angew. Chem. Int. Ed., 2008, 47, 2622-2625.

“Heterolytic dihydrogen activation with the 1,8-bis(diphenylphosphino)- naphthalene/B(C6F5)3 pair and its application for metal-free catalytic hydrogenation of silyl enol ethers”, H. Wang, R. Fröhlich, G. Kehr, G. Erker, Chem. Commun., 2008, 5966-5968.

“Structural Features of (Cp-PPh2AuCl)2ZrCl2: Exploring the Limits of Aurophilic Interactions”, M. Moriya, R. Fröhlich, G. Kehr, G. Erker, S. Grimme, Chem. Asian J., 2008, 3, 753-758.

“(N-Arylaminomethyl)pyridine-N-oxides: Synthesis and Characterization of Potential Ligand Systems and the Formation of their N,O-Chelate Aluminum Complexes”, K. Nienkemper, G. Kehr, S. Kehr, R. Fröhlich, G. Erker, J. Organomet. Chem., 2008, 693, 3063-3073.

“Functionalized Alkali Metal Cyclopentadienides: Structural and Chemical Features”, G. Erker, G. Kehr, R. Fröhlich, Organometallics, 2008, 27, 3-14.

“(Amidomethyl)pyridine Zirconium and Hafnium Complexes: Synthesis and Structural Characterization”, K. Nienkemper, G. Kehr, S. Kehr, R. Fröhlich, G. Erker, J. Organomet. Chem., 2008, 693, 1572-1589.

“Functional Group Chemistry at the Zirconocene Backbone: Addition Reactions to Pendent Alkynyl Substituents”, L. Chen, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem., 200873-83.

“Structural Importance of Secondary Interactions in Molecules: Origin of Unconventional Conformations of Phosphine-Borane Adducts”, P. Spies, R. Fröhlich, G. Kehr, G. Erker, S. Grimme, Chem. Eur. J., 2008, 14, 333-343. (corrigendum: Chem. Eur. J., 2008, 14, 772-779.)

“Functional Group Chemistry at the Zirconocene Backbone: Addition Reactions to Pendent Alkynyl Substituents” L. Chen, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem. 2008, 73-83.

“(Amidomethyl)pyridine Zirconium and Hafnium Complexes: Synthesis and Structural Characterization”, K. Nienkemper, G. Kehr, S. Kehr, R. Fröhlich, G. Erker, J. Organomet. Chem. 2008, 693, 1572-1589.

“Functionalized Alkali Metal Cyclopentadienides: Structural and Chemical Features”, G. Erker, G. Kehr, R. Fröhlich, Organometallics, 2008, 27, 3-14.

(N-Arylaminomethyl)pyridine-N-oxides: Synthesis and Characterization of Potential Ligand Systems and the Formation of their N,O-Chelate Aluminum Complexes”, K. Nienkemper, G. Kehr, S. Kehr, R. Fröhlich, G. Erker , 2008, 693, 3063-3073.

“Structural Features of (Cp–PPh2AuCl)2ZrCl2: Exploring the Limits of Aurophilic Interactions”, M. Moriya, R. Fröhlich, G. Kehr, G. Erker, S. Grimme, Chem. Asian J., 2008, 3, 753-758.

“Metallacyclische Fünfring-Allenoide: Synthese und Struktur stabiler stark verzerrter cyclischer Allen-Derivate”, J. Ugolotti, G. Dierker, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, Angew. Chem., 2008, 120, 2662-2665; “Five-membered Metallacyclic Allenoids: Synthesis and Structure of Remarkably Stable Strongly Distorted Cyclic Allene Derivatives”, J. Ugolotti, G. Dierker, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, Angew. Chem. Int. Ed., 2008, 47, 2622-2625.

“Reactions of Pendant Boryl Groups at Cp-Metal Complexes: Heterocyclic Ring Annelation at a CpIr-System”, C. Herrmann, G. Kehr, R.. Fröhlich, G. Erker, Eur. J. Inorg. ., 2008, 2273-2277.

“Bis(diphenylphosphino)acetonitrile oxides, -sulfides and –imines: their formation and structural features, and the remarkable structures of two lithiated derivatives“, L. Braun, G. Kehr, R. Fröhlich, G. Erker, Inorg. Chim. Acta, 2008, 361, 1668-1675.

“Structural Features of Lithio[3]ferrocenophane Systems Bearing Stabilizing Dimethylamino Substituents”, C. Chen, R. Fröhlich, G. Kehr, G. Erker, Organometallics 2008, 7, 3248-3253.

“Chemical Behavior of a Pair of (COD)CpRh and -Ir Complexes with Pendent Peripheral –B(C6F5)2 Groups”, C. Herrmann, G. Kehr, R. Fröhlich, G. Erker, Organometallics 2008, 2328-2336.

“Functionalized phosphorus analogues of the b-diketiminato ligand systems: Bis(N-arylphosphinimino)acetonitrile-derived complexes of rhodium and iridium”, K. Spannhoff, G. Kehr, S. Kehr, R. Fröhlich, G. Erker, Dalton Trans. 2008, 3339-3344.

“Quart-Feproline: Synthesis of a Very Rigid [3]Ferrocenophane Derived Artificial Amino Acid”, L. Tebben, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem, 2008, 2654-2658.

“Ferrocene-Derived Bioorganometallic Chemistry: Preparation of a [3]Ferrocenophane γ-Amino Acid for Use in Peptide Synthesis”, L. Tebben, K. Bussmann, M. Hegemann, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2008, 27, 4269-4272.

“Metal-Free Catalytic Hydrogenation of Enamines, Imines and Conjugated Phosphinoalkenylboranes<”, P. Spies, S. Schwendemann, S. Lange, G. Kehr, R. Fröhlich, G. Erker, Angew. Chem. Int. Ed., 2008, 47, 7543-7546. “Metallfreie katalytische Hydrierung von Enaminen, Iminen und Phosphinoalkenyl-

 

2007


"Crystal-smectic E mesophases in a series of 2-(4-n-alkylphenyl)indenes ”, S. M. Schultz, G. Kehr, R. Fröhlich, G. Erker, N. Kapernaum, C. Hägele, F. Giesselmann, S. Laschat, R. Judele, A. Baro, Liquid Crystals, 2007, 34, 919-926.

“Rapid Intramolecular Heterolytic Dihydrogen Activation by a Four-membered Heterocyclic Phosphane-Borane Adduct”, P. Spies, G. Erker, G. Kehr, K. Bergander, R. Fröhlich, S. Grimme, D. W. Stephan, Chem. Commun., 2007, 5072-5074.

“Bis(diphenylphosphino)acetonitrile: Synthesis, ligand properties and application in catalytic carbon-carbon coupling”, L. Braun, P. Liptau, G. Kehr, J. Ugolotti, R. Fröhlich, G. Erker, Dalton Trans., 2007, 1409-1415.

“Remarkable Dichotomy of Oligomeric Chain Structures of Dilithium(amidoalkyl-cyclopentadienide) Systems Li2[C5H4–CHRNAr]”, V. V. Kotov, C. Wang, G. Kehr, R. Fröhlich, G. Erker, Organometallics, 2007, 26, 6258-6262.

“Preferred Phosphorus Ylid Formation upon Alkylation of Lithiobis(diphenylphosphino)acetonitrile“, L. Braun, G. Kehr, T. Blömker, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem. 2007, 3083-3090.

“Ein 1,8-Naphthylen-verbrücktes Bis(indenyl)zink-THF-Addukt: Synthese und Struktur eines ansa-Zinkocen-Derivates”, H. Wang, G. Kehr, R. Fröhlich, G. Erker, Angew. Chem. 2007, 119, 4992-4995; “A 1,8-Naphthylene-Bridged Bis(indenyl)zinc THF Adduct: Formation and Structure an ansa-Zincocene Derivative”, H. Wang, G. Kehr, R. Fröhlich, G. Erker, Angew. Chem. Int. Ed. 2007, 46, 4905-4908.

“A Salt Metathesis Route to Ruthenium Carbene Complex Isomers with Pyridine Dicarboxamide-derived Chelate Pincer Ligands”, C. Wallenhorst, K. V. Axenov, G. Kehr, J. S. M. Samec, R. Fröhlich, G. Erker, Z. Naturforsch. 2007, 62b, 783-790.

“Formation, Structural and Dynamic Features of Atropisomeric h2-Iminoacyl Zirconium Complexes”, P. Spies, G. Kehr, S. Kehr, R. Fröhlich, G. Erker, Organometallics 2007, 26, 5612-5620.

 

2006


"Oligoethylene Chains Terminated by Ferrocenyl End Groups: Synthesis, Structural Properties and Two-Dimensional Self-Assembly on Surfaces", K. Wedeking, Z. Mu, G. Kehr, J. Cano Sierra, C. Mück Lichtenfeld, S. Grimme, G. Erker, R. Fröhlich, L. Chi, W. Wang, D. Zhong, H. Fuchs, Chem. Eur. J., 2006, 12, 1618-1628.

"Group 4 bent metallocenes and functional groups - Finding convenient pathways in a difficult terrain", G. Erker, G. Kehr, R. Fröhlich, Coord. Chem. Rev. 2006, 250, 36-46.

"Chelate [2-(Iminoethyl)pyridine N-oxide]metal Complexes - Synthesis and Structural Comparison with Their Chemically Related 2-(Iminoethyl)pyridine-Derived Systems", K. Nienkemper, V. V. Kotov, G. Kehr, G. Erker, R. Fröhlich, Eur. J. Inorg. Chem. 2006, 366-379.

"Tetradecylferrocene: Ordered Molecular Array of an Organometallic Amphiphile in the Crystal and in a Two-dimensional Assembled Structure on a Surface", K. Wedeking, Z. Mu, G. Kehr, R. Fröhlich, G. Erker, L. Chi, H. Fuchs, Langmuir 2006, 22, 3161-3165.

“Imidazolin-2-iminato titanium complexes: synthesis, structure and use in ethylene polymerization catalysis”, M. Tamm, S. Randoll, E. Herdtweck, N. Kleigrewe, G. Kehr, G. Erker, B. Rieger, Dalton Trans. 2006, 459-467.

"Development of a convenient new synthetic route to [3]ferrocenophanones”, L. Tebben, M. Neumann, G. Kehr, R. Fröhlich, G. Erker, S. Losi, P. Zanello, Dalton Trans., 2006, 1715-1720; Chem. Sci. 2006, 3, C29.

"Formation of a Dynamic h2(O,N)-Hydroxylaminato Zirconocene Complex by Nitrosoarene Insertion into a Zr-C s-Bond", S. A. Cummings, R. Radford, G. Erker, G. Kehr, R. Fröhlich, Organometallics 2006, 25, 839-842.

“Bildung eines metallorganischen Ladderan-Derivats durch eine dynamische topochemische Reaktion”, J. Paradies, I. Greger, G. Kehr, G. Erker, K. Bergander, R. Fröhlich, Angew. Chem. 2006, 118, 7792-7795; „Formation of an Organometallic Ladderane Derivative by Dynamic Topochemical Reaction Control“, J. Paradies, I. Greger, G. Kehr, G. Erker, K. Bergander, R. Fröhlich, Angew. Chem. Int. Ed. Engl.2006, 45, 7630-7633.

“Carbohydrate-metallocene conjugates: selective formation of a zirconadioxacyclopentane-type dimer from the reaction of a bis(enolate)ZrCp2 reagent with a glucofuranoside derivative”, B. Meyer zu Berstenhorst, G. Erker, G. Kehr, R. Fröhlich, Dalton, 2006, 3200-3203.

“Product Diversity in the Reaction of [(norbornadiene){CpP(iPr)2}Rh] with Alkyl Iodides”, E. Ortega, N. Kleigrewe, G. Kehr, G. Erker, R. Fröhlich, Eur. J. Inorg. Chem. 2006, 3769-3774.

“[2+2]Cycloaddition and Subsequent meso/rac ansa-Metallocene Interconversion by Photolysis of a Bis(1,3-dialkenylcyclopentadienyl)zirconium Complex”, J. Paradies, R. Fröhlich, G. Kehr, G. Erker, Organometallics 2006, 25, 3920-3925.

“Stereo-electronic interaction in complex molecules: cyclopropyl conjugation with Lewis acidic centres across connecting carbon-carbon triple bonds”, G. Dierker, G. Kehr, R. Fröhlich, G. Erker, S. Grimme, Chem. Commun., 2006, 3912-3914.

“Insertion Reactions at Cyclobutylene-Bridged ansa-Metallocene Complexes: A Quest for the Influence of Covering Phenylene Units“, L. Chen, W.-L. Nie, J. Paradies, G. Kehr, R. Fröhlich, K. Wedeking, G. Erker, Organometallics 2006, 25, 5333-5344.

“Polymerization Special Feature: Ansa-metallocene polymerization catalysts derived from [2+2]cycloaddition reactions of bis(1-methylethenyl-cyclopentadienyl)zirconium systems”, J. Paradies, G. Kehr, R. Fröhlich, G. Erker, PNAS 2006, 103, 15333-15337.

“Functional-Group Attachment and Interconversion at a Chiral [3]Ferrocenophane Framework”, C. Nilewski, M. Neumann, L. Tebben, R. Fröhlich, G. Kehr, G. Erker, Synthesis 2006, 13, 2191-2200.

“Oligomeric Supersandwich Structure of a Lithium Enamino-Cyclopentadienide”, V. V. Kotov, G. Kehr, R. Fröhlich, G. Erker, Z. Naturforsch. 2006, 61b, 1319-1322

 

2005


"Formation of Chiral Ionic Liquids and Imidazol-2-ylidene Metal Complexes from the Proteinogenic Aminoacid L-Histidine", F. Hannig, G. Kehr, R. Fröhlich, G. Erker, J. Organomet. Chem. 2005, 690, 5959-5972.

"Reaction of Rosenthal's Zirconacyclocumulenes with Chlorophosphines", P. Spieß, G. Kehr, R. Fröhlich, G. Erker, S. Grimme, C. Mück-Lichtenfeld, Organometallics 2005, 24, 4742-4746.

"Ruthenium Carbene Complexes Featuring a Tridentate Pincer-type Ligand", J.-C. Wasilke, G. Wu, X. Bu, G. Kehr, G. Erker, Organometallics 2005, 24, 4289-4297.

"Synthesis, Structural Features, and Formation of Organometallic Derivates of C1-bridged Cp/Amido Titanium and Zirconium "CpCN-Constrained Geometry" Systems", C. Wang, G. Erker, G. Kehr, K. Wedeking, R. Fröhlich, Organometallics 2005, 24, 4760-4773.

"The (Butadiene)zirconocene Route to Active Homogeneous Olefin Polymerization Catalysts", G. Erker, G. Kehr, R. Fröhlich, J. Organomet. Chem. 2005, 690, 6254-6262.

"Structural Features of Titanium Complexes of Salicylaldiminato Derivatives of Amino Acids", J. Müller, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem. 2005, 2836-2841.

"Chelate Bis(imino)pyridine Cobalt Complexes: Synthesis, Reduction and Evidence for the Generation of Ethene Polymerization Catalysts by Li+-Cation Activation", N. Kleigrewe, W. Steffen, T. Blömker, G. Kehr, R. Fröhlich, B. Wibbeling, G. Erker, J. Am. Chem. Soc. 2005, 127, 13955-13968.

"Preparation of Enantiomerically Pure [3]Ferrocenophane-Based Chelate Bis-Phosphane Ligands and Their Use in Asymmetric Alternating Carbon Monoxide/Propene Copolymerization", P. Liptau, L. Tebben, G. Kehr, R. Fröhlich, G. Erker, F. Hollmann, B. Rieger, Eur. J. Org. Chem. 2005, 9, 1909-1918.

"Chemistry of Metal Metal Bonded Early-Late Heterobimetallics - Cooperative Reactions of Functional Groups at a Persistent Organometallic Zr Rh Framework", C. Cornelißen, G. Erker, G. Kehr, R. Fröhlich, Organometallics 2005, 24, 214-225.

"Bis(enamino-Cp) Group 4 Metal Complex Chemistry: Developing a Mannich-type Carbon-Carbon Coupling Reaction at the Bent Metallocene Framework", S. Knüppel, C. Wang, G. Kehr, R. Fröhlich, G. Erker, J. Organomet. Chem. 2005, 690, 14-32

"Bioorganometallic Chemistry: Reactions of (Methyl)titanocene Cation Complexes with a Singly Deprotected Methylglucopyranoside", B. Meyer von Berstenhorst, G. Erker, G. Kehr, J.-C. Wasilke, J. Müller, H. Redlich, J. Pyplo, Eur. J. Inorg. Chem. 2005, 92-99.

 

2004



"Facile [N]C H Activation at a (P,N) Chelate [3]Ferrocenophane Ruthenium System", P. Liptau, D. Carmona, L. A. Oro, F. J. Lahoz, G. Kehr, G. Erker, Eur. J. Inorg. Chem. 2004, 4586-4590.

"Some Selected Chapters from the (Butadiene)zirconocene Story", G. Erker, G. Kehr, R. Fröhlich, J. Organomet. Chem. 2004, 689, 4305-4318.

"Formation and Structure of a Bis(cyclopentadienyl)formamidinato)zirconium Cation Complex", C. Cornelißen, G. Erker, G. Kehr, R. Fröhlich, Z. Naturforsch. 59b, 2004, 1246-1252.

"Formation and Reactions of Metal Metal Bonded Heterobimetallic (C5H4-PR2)-Bridged (Zr Ir) and (Zr Rh) Complexes: Evidence for the Participation of Metal Hydride Intermediates", C. Cornelißen, G. Erker, G. Kehr, R. Fröhlich, Dalton Trans. 2004, 4059-4063.

"Exploring CH-Activation Pathways in Bifunctional Zirconocene/Borane Systems", M. Hill, G. Erker, G. Kehr, R. Fröhlich, O. Kataeva, J. Am. Chem. Soc. 2004, 126, 11046-11057.

"Evidence for a Carbon Carbon Coupling Reaction to Proceed through a Planar-Tetracoordinate Carbon Intermediate", G. Erker, S. Venne-Dunker, G. Kehr, N. Kleigrewe, R. Fröhlich, C. Mück-Lichtenfeld, S. Grimme, Organometallics 2004, 23, 4391-4395.

"An Internally Coordinated Metalla[14]-crown-5 System with a Pentagonal-dipyrimadal Coordination Geometry of the Central Titanium Atom", G. Unger, G. Erker, G. Kehr, R. Fröhlich, Z. Naturforsch. 59b, 2004, 917-920.

"Metallocene Carbene Chemistry", G. Erker, G. Kehr, R. Fröhlich, Russ. Chem. Bull., Int. Ed., Vol. 53, 2004, 5, 1007-1019; Izv. Akad. Nauk., Ser. Khim. 2004, 5, 965-976.

"The Synthesis of Optically Active Primary Amino[3]ferrocenophanes", L. Tebben, G. Kehr, R. Fröhlich, G. Erker, Synthesis, 2004, 12, 1971-1976.

"Generation of bis(iminoalkyl)pyridine cobalt(I) cations under alkyl group free conditions that polymerize ethene", W. Steffen, T. Blömker, N. Kleigrewe, G. Kehr, R. Fröhlich, G. Erker, Chem. Commun. 2004, 1188-1189.

"Formation of a bifunctional zirconocene complex that favours intramolecular -B(C6F5)2 addition to a Cp ring over s-ligand abstraction", M. Hill, G. Kehr, G. Erker, O. Kataeva, R. Fröhlich, Chem. Commun. 2004, 1020-1021.

"Developing some functional group chemistry at the Group 4 bent metallocene frameworks", G. Erker, G. Kehr, R. Fröhlich, J. Organomet. Chem. 2004, 689, 1402-1412.

"A Fulvene Route to Group 4 Metallocene Complexes Bearing 4,7-Bis(dimethylamino)-Substituted Indenyl Ligands", J. Cano Sierra, K. Kunz, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem. 2004, 2260-2265.

"Synthesis of Alkylidene-Bridged Cp/Phosphido Group 4 Metal Complexes   Precursors of the "(CpCPR)M Constrained-Geometry" Catalyst Family", S. Bredeau, G. Altenhoff, K. Kunz, S. Döring, S. Grimme, G. Kehr, G. Erker, Organometallics 2004, 23, 1836-1844.

"(m-Methylene)bis(methylzirconocene): Preparation, Molecular Structure, and Thermal Disproportionation", M. Hogenbirk, G. Schat, O. S. Akkerman, F. Bickelhaupt, J. Schottek, M. Albrecht, R. Fröhlich, G. Kehr, G. Erker, H. Kooijman, A. L. Spek, Eur. J. Inorg. Chem. 2004, 1175-1182.

"The (Butadiene)zirconocenes and Related Compounds", G. Erker, G. Kehr, R. Fröhlich, Adv. Organomet. Chem. 2004, 51, 109-162.

"Responsive Iron Neighboring Group Participation in Amino Substituent-Stabilized [3]Ferrocenophane a-Carbenium Ions: A Combined Theoretical and Experimental Study", P. Liptau, M. Neumann, G. Erker, G. Kehr, R. Fröhlich, S. Grimme, Organometallics 2004, 23, 21-25.

"(Butadiene)metallocene/B(C6F5)3 Pathway to Catalyst Systems for Stereoselective Methyl Methacrylate Polymerization: Evidence for an Anion Dependent Metallocene Catalyzed Polymerization Process", J. W. Strauch, J.-L. Fauré, S. Bredeau, C. Wang, G. Kehr, R. Fröhlich, H. Luftmann, G. Erker, J. Am. Chem. Soc. 2004, 126, 2089-2104.

"Formation of a Unique ansa-Metallocene Framework by Intramolecular Photochemical [2+2] Cycloaddition of Bis(2-alkenylindenyl)zirconium Complexes", W.-L. Nie, G. Erker, G. Kehr, R. Fröhlich, Angew. Chem. Int. Ed. Engl. 2004, 43, 310-313. "Bildung eines neuartigen ansa-Metallocen-Gerüsts durch intramolekulare photochemische [2+2]-Cycloaddition von Bis(2-alkenylindenyl)zirconium Komplexen", Angew. Chem. 2004, 116, 313-317.

 

2003


“Formation of dinuclear titanium and zirconium complexes by olefin metathesis--catalytic preparation of organometallic catalyst systems”, J. Cano Sierra, D. Huerlander, M. Hill, G. Kehr, G. Erker, R. Fröhlich, Chemistry (Weinheim an der Bergstrasse, Germany) 20039(15), 3618-3622.

"Organic Functional Group Transformations in the Periphery of a Group-4 Metallocene Complex: 2H-Pyrrole Formation at a Pendant Boron Lewis Acid", M. Hill, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem. 2003, 3583-3589.

"Generation and Structural Characterization of [(Imidazol-2-ylidene)HfCl5]-Anion/Imidazolium Cation Salt", M. Niehues, G. Kehr, R. Fröhlich, G. Erker, Z. Naturforsch., 2003, 58b, 1005-1008.

"Formation of Dinuclear Titanium and Zirconium Complexes by Olefin Metathesis – Catalytic Preparation of Organometallic Catalyst Systems", J. Cano Sierra, D. Hüerländer, M. Hill, G. Kehr, G. Erker, R. Fröhlich, Chem. Eur. J. 2003, 9, 3618-3622.

"Preparation of chelate bis(imine)nickel allyl systems by reaction of their corresponding butadiene complexes with electrophiles", J. W. Strauch, G. Kehr, G. Erker, J. Organomet. Chem. 2003, 683, 249-260.

"Preparation of Optically Active a-Amino[3]ferrocenophanes – Building Blocks for Chelate Ligands in Asymmetric Catalysis", P. Liptau, L. Tebben, G. Kehr, B. Wibbeling, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem. 2003, 3590-3600; 4261.

"Formation of a Chelate Bis(phosphino)[3]ferrocenophane Ligand and Its Use in Palladium-Catalyzed Alternating CO/Ethene Copolymerization", P. Liptau, T. Seki, G. Kehr, A. Abele, R. Fröhlich, G. Erker, S. Grimme, Organometallics 2003, 22, 2226-2232.

"Preparation and characterization of some structural variants of Cp*Ti(1,2-propandiolato) complexes", A. Snell, G. Kehr, O. Kataeva, R. Fröhlich, G. Erker, J. Organomet. Chem. 2003, 687, 171-177.

"Structural Features of a Sulfur-Containing Group 4 Metalla[11]-crown-4 Derivative", A. Snell, G. Kehr, B. Wibbeling, R. Fröhlich, G. Erker, Z. Naturforsch. 2003, 58b, 838-842.

"Synthesis and structural features of [(C5H4-CMe2NMe2)2TiCl], a bis(cyclopentadienyl)Ti(III) complex with internal dimethylamino coordination", V. V. Kotov, R. Fröhlich, G. Kehr, G. Erker, J. Organomet. Chem. 2003, 676, 1-7.

"Formation of a Doubly C,N-Bridged Six-Membered Metallacyclic Bis[(2-imidazolyl)zirconocene] Dication", D. Vagedes, G. Erker, G. Kehr, G. Erker, Organometallics 2003, 22, 948-958.

"Synthesis and Dynamic Features of (Chloro)zirconocene Cations Stabilised by Pendant (Diarylphosphanyl)alkyl and (Dimethylamino)alkyl Substituents at their Cyclopentadienyl Ring Systems", S. Döring, V. V. Kotov, G. Erker, G. Kehr, K. Bergander, O. Kataeva, R. Fröhlich, Eur. J. Inorg. Chem. 2003, 1599-1607.

"Tris(pentafluorophenyl)borane adducts of substituted imidazoles: conformational features and chemical behavior upon deprotonation", D. Vagedes, G. Erker, G. Kehr, K. Bergander, O. Kataeva, R. Fröhlich, S. Grimme, C. Mück-Lichtenfeld, Dalton Trans. 2003, 1337-1344.

 

2002


"Synthesis of a Dinuclear m-(h2-Thioaldehyde)zirconocene Cation Complex", S. Courtenay, S. Smith, E. Hollink, U. Blaschke, G. Kehr, R. Fröhlich, G. Erker, D. W. Stephan, Z. Naturforsch. 2002, 1184-1188.

"Structural characterization of Group 4 transition metal halide bis-Arduengo carbene complexes MCl4L2: X-ray crystal structure analyses and DFT calculations", M. Niehues, G. Kehr, G. Erker, B. Wibbeling, R. Fröhlich, O. Blacque, H. Berke, J. Organomet. Chem. 2002, 663, 192-203.

"The Reaction of (Butadiene)zirconocene with Imines", C. Höltke, G. Erker, G. Kehr, R. Fröhlich, O. Kataeva, Eur. J. Inorg. Chem. 2002, 2789-2799.

"Reaction of [(Cp2TiCH3)(THF)+][BPh4-] with Tripeptide Derivatives: Formation of Cationic (Peptide)titanocene Complexes", D. Harmsen, G. Erker, R. Fröhlich, G. Kehr, Eur. J. Inorg. Chem. 2002, 3156-3171.

"Bildung eines zwitterionischen Einkomponentenkatalysators für die Ethenpolymerisation auf Basis von Butadiennickelkomplexen: ein alternativer Aktivierungsweg bei homogenen Ziegler Natta-Katalysatoren später Übergangsmetalle", J. Strauch, G. Erker, G. Kehr, R. Fröhlich, Angew. Chem. 2002, 114, 2662-2664; "Formation of a Butadienenickel-Based Zwitterionic Single-Component Catalyst for Ethylene Polymerization: An Alternative Activation Pathway for Homogeneous Ziegler Natta Catalysts of Late Transition Metals", J. Strauch, G. Erker, G. Kehr, R. Fröhlich, Angew. . Int. Ed. Engl.2002, 41, 2543-2546.

"Synthesis, Structural and Chemical Characterization of Unsaturated C4- and C10-Bridged Group-4 ansa-Metallocenes Obtained Through a Ring-Closing Olefin Metathesis Reaction", D. Hüerländer, N. Kleigrewe, G. Kehr, G. Erker, R. Fröhlich, Eur. J. Inorg. Chem. 2002, 2633-2642.

"Structural Features of Me2Si-Bridged Cp/Phosphido Group 4 Metal Complexes, "CpSiP" Constrained-Geometry Ziegler Natta Catalyst Precursors", G. Altenhoff, S. Bredeau, G. Erker, G. Kehr, O. Kataeva, R. Fröhlich, Organometallics 2002, 21, 4084-4089.

“Homogeneous single component betaine Ziegler-Natta catalysts: Mechanistic features and synthetic developments”, G. Erker, G. Kehr, J. Strauch, B. Temme, J. Karl, M. Dahlmann, T. Helaja, R. Fröhlich, H. Luftmann, Polymeric Materials Science and Engineering 2002, 87, 64-74.

"Synthesis and Structural Features of Arduengo Carbene Complexes of Group 4 Metallocene Cations", M. Niehues, G. Erker, G. Kehr, P. Schwab, R. Fröhlich, O. Blacque, H. Berke, Organometallics 2002, 21, 2905-2911.

"Formation of Isomeric BAr3 Adducts of 2-Lithio-N-methylimidazole", D. Vagedes, G. Kehr, D. König, K. Wedeking, R. Fröhlich, G. Erker, C. Mück-Lichtenfeld, S. Grimme, Eur. J. Inorg. Chem. 2002, 2015-2021.

“Novel organotin halides. Organometallic substituted stannoles and alkene derivatives with tin-chlorine and tin-bromine bonds - exceptionally small magnitude of coupling constants |1J(119Sn,13C)|”, B. Wrackmeyer, G. Kehr, S. Willbold, S. Ali, J. Organomet. Chem. 2002, 646(1-2), 125-133.

"Formation of sp3-C1-Bridged Cp/Amido Titanium and Zirconium "CpCN" Constrained-Geometry Ziegler Natta Catalyst Systems", K. Kunz, G. Erker, S. Döring, S. Bredeau, G. Kehr, R. Fröhlich, Organometallics 2002, 21, 1031-1041.

"Formation of Cyclodimeric (sp2-C1)-Bridged Cp/-Oxido ("CpC1O"MIVX2) Group 4 Metal Ziegler-Natta Catalyst Systems – How Important is the "Constrained Geometry" Effect?", K. Kunz, G. Erker, G. Kehr, R. Fröhlich, H. Jacobsen, H. Berke, O. Blacque, J. Am. Chem. Soc. 2002, 124, 3316-3326.

 

2001


"Thermochemical Heat Treatment of Steel Substrates using Borane-Amine Adducts as Precursors", A. Küper, G. Kehr, J. Pflug, H.-R. Stock, C. Sarter, P. Mayr, G. Erker, Surface Engineering, 2001, 17, 55-60.

"The Development of Single Component Metallocene Betaine Ziegler-Natta Catalysts and Related Systems", B. Temme, J. Karl, M. Dahlmann, K. Bergander, G. Kehr, H. Luftmann, R. Fröhlich, T. Jödicke, G. Erker, in Advances on Organometallic Catalysts and Olefin Polymerization in China and Germany, Ed. J. Sun, C. Janiak, Chemical Industry Press, Beijing, China, 2001, S. 82-93.

"Formation and structural characterization of amino-substituted [3]ferrocenophanes derived from intramolecular Mannich-type coupling reactions at the metallocene framework", P. Liptau, S. Knüppel, G. Kehr, O. Kataeva, R. Fröhlich, G. Erker, J. Organomet. Chem. 2001, 637-639, 621-630.

"Conformational Features of Group-4 ansa-Metallocenes with Long -(CH2)n-Chains Connecting their Cyclopentadienyl Ligands", T. Jödicke, F. Menges, G. Kehr, G. Erker, U. Höweler, R. Fröhlich, Eur. J. Inorg. Chem. 2001, 2097-2106.

"Synthesis and Structural Behavior of the Tris(h-cyclopentadienyl)zirconium-Betaine Complex Cp2[h5-C5H4B(C6F5)3]Zr", N. Kleigrewe, T. Brackemeyer, G. Kehr, R. Fröhlich, G. Erker, Organometallics 2001, 20, 1952-1955.

"Synthesis and Structural and Chemical Features of Formimidoyl-Functionalized Lithium Cyclopentadienides", K. Kunz, G. Erker, G. Kehr, R. Fröhlich, Organometallics 2001, 20, 392-400.

"Generation of Homogeneous (sp3-C1)-Bridged Cp/Amido and Cp/Phosphido Group 4 Metal Ziegler-Natta Catalyst Systems", K. Kunz, G. Erker, S. Döring, R. Fröhlich, G. Kehr, J. Am. Chem. Soc. 2001, 123, 6181-6182.

"Protonation of the Heterocyclic Cp-Anion Equivalent [Pyrrolyl-B(C6F5)3]Li - Formation of a Useful Neutral Brønsted Acid for the Generation of Homogeneous Metallocene Ziegler Catalysts", G. Kehr, R. Roesmann, R. Fröhlich, C. Holst, G. Erker, Eur. J. Inorg. Chem. 2001, 535-538.

 

2000


"Addition and Coupling Reactions of Zirconocene Cation Complexes that Contain a Pendant h2-Formaldiminium Side Chain", J. Pflug, G. Erker, G. Kehr, R. Fröhlich, Eur. J. Inorg. Chem. 2000, 1795-1801.

"Probing The Dynamic Features of Bis(aminocyclopentadienyl) and Bis(aminoindenyl) Zirconium Complexes" S. Knüppel, J.-L. Fauré, G. Erker, G. Kehr, M. Nissinen, R. Fröhlich, Organometallics 2000, 19, 1262-1268.

"Reactions of Functional Groups at the Periphery of Group 4 Metallocene Frameworks: Selective Formation of a Cp-Bonded Azaboretidine Derivative by a Hydroboration Route", D. Kunz, G. Erker, R. Fröhlich, G. Kehr, Eur. J. Inorg. Chem. 2000, 409-416.

"(N-Pyrrolyl)B(C6F5)2 – A New Organometallic Lewis Acid for the Generation of Group 4 Metallocene Cation Complexes", G. Kehr, R. Fröhlich, B. Wibbeling, G. Erker, Chem. Eur. J. 2000, 6, 258-266.

 

1999


“Novel Rearrangements and Formation of 2,5-Dihydro-1,2,5-oxonia-stannaboratoles via Methanolysis of Zwitterionic h2-(Alkyn-1-yl-borate)alkenyltin Compounds”, B. Wrackmeyer, G. Kehr, S. Willbold, and R. Boese, Chemistry of Heterocyclic Compounds (New York)(Translation of Khimiya Geterotsiklicheskikh Soedinenii) 2000, Volume Date 1999, 35(9), 1041-1051.

"Group 5 Metal Complexes with Cyclooctatetraene: Formation and Characterization of (Butadiene) (cyclooctatetraene)(cyclopentadienyl)tantalum Systems", H. C. Strauch, K. Bergander, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem. 1999, 1461-1466.

"Stable Borate-Bridged ansa-Zirconocene Complexes. Preparation and X-ray Crystallographic Characterization of [Cp*2Al]+[Me(Ph)B(h5-C5H4)2ZrCl2]- and [PPN]+[Cl(Ph)B(h5-C5H4)2ZrCl2]", C. T. Burns, D. S. Stelck, P. J. Shapiro, A. Vij, K. Kunz, G. Kehr, T. Concolino, A. L. Rheingold, Organometallics 1999, 18(26), 5432-5434.

"Evidence for a-Nitrogen Participation in the Internal C-H Activation Reaction at ((Dimethylamino)methyl)cyclopentadienyl-Derived Methylzirconocene Cations", J. Pflug, A. Bertuleit, G. Kehr, R. Fröhlich, G. Erker, Organometallics 1999, 18, 3818-3826.

"Lewis Acid Properties of Tris(pentafluorophenyl)borane. Structure and Bonding in L-B(C6F5)3Complexes", H. Jacobsen, H. Berke, S. Döring, G. Kehr, G. Erker, R. Fröhlich, O. Meyer, Organometallics 1999, 18, 1724-1735.

Reactions of Zwitterionic h2-(Alkyn-1-yl-borate)alkenyltin Compounds with Lewis bases”, B. Wrackmeyer, G. Kehr, S. Willbold, J. Organomet. Chem. 1999, 590, 93-103.

"1,1-Organoboration of Tetraynes – Routes to New Siloles, Stannoles and FusedHeterocycles“, B. Wrackmeyer, G. Kehr, J. Süß, E. Molla, J. Organomet. Chem. 1999, 577, 82-92.

 

1998


"1,6-Dihydro-1,6-disilapentalene Derivatives by 1,1-Organoboration of Triynes“, B. Wrackmeyer, G. Kehr, J. Süß, E. Molla, J. Organomet. Chem. 1998, 562, 207-215.

"C1-verbrückte Fluorenyliden-Indenylidenkomplexe des Typs (C13H8-CR2-C9H6-nR'n)ZrCl2 (n = 0, 1; R = Me, Ph, Butenyl; R' = Alkyl, Alkenyl) als Metallocenkatalysatorvorstufen für die Ethylenpolymerisation", H. G. Alt, M. Jung, G. Kehr, J. Organomet. Chem.1998, 562, 153-281.

"Trisilylamines, a 13C, 15N and 29Si NMR Study in Solution - Evidence for Si-Br-Si Bridging", B. Wrackmeyer, G. Kehr, D. Wettinger, Magn. Reson. Chem. 1998, 36, S157-S160.

Reaction of 9-Borabicyclo[3.3.1]nonane with N-Trimethylsilylamines - Cleavage of the N-Si or N-H Bond", B. Wrackmeyer, G. Kehr, S. Ali, Z. Naturforsch. 1998, 53b, 393-395.

N-Trialkylstannyl Substituted Pyrroles, Indoles and N-Trimethylstannyl-carbazole: Determination of Signs of Coupling Constants and Isotope-Induced Chemical Shifts 1D14/15N(119Sn)“, B. Wrackmeyer, G. Kehr, H. E. Maisel, H. Zhou, Magn. Reson. Chem. 1998, 36, 39-45.

 

1997


H-1,C-13,Sn-119 NMR, Sn-119m Mossbauer, Infrared and Mass Spectrometric Studies of Organotin Carboxylates of 2-(2,3-Dimethylphenyl)aminobenzoic Acid and Their Effect on Microorganisms.”, M. Danish, S. Ali, A. Badshah, M. Mazhar, H Masood, A. Malik, G. Kehr, Synthesis and Reactivity in Inorganic and Metalorganic Chemistry 1997, 27 (6), 863-885.

1,10-Distanna-cyclo-octadeca-2,8,11,17-tetrayne“, B. Wrackmeyer, G. Kehr, D. Wettinger, Main Group Met. Chem. 1997, 20, 573-579.

“[m2-,h2-Alkynyl-hexacarbonyldicobalt]organotin Complexes and the Molecular Structure of Bis[m2-,h2-ethynylhexacarbonyldicobalt]diphenyltin“, B. Wrackmeyer, G. Kehr, H. E. Maisel, H. Nöth, J. Organomet. Chem. 1997, 532, 201-206.

Di-tert-butyl(N-pyrrolyl)phosphane, -sulfide, and -selenide - Studied by Multinuclear Magnetic Resonance“, B. Wrackmeyer, G. Kehr, H. Zhou, Fresenius J. Anal. Chem. 1997, 357, 489-493.

“Pentaalkyl-6-diphenylphosphino-2,3,4,5-tetracarba-nido-hexaboranes(6).” B. Wrackmeyer, A. Glockle, G. Kehr, Phosphorus, Sulfur and Silicon and the Related Elements 1997, 131, 25-35.

 

1996


Organometallic-substituted Allenes - Determination of Coupling Signs and Molecular Structures of two Stannylated Allenes“, B. Wrackmeyer, U. Dörfler, G. Kehr, H. E. Maisel, W. Milius, J. Organomet. Chem. 1996, 524, 169-170.

Coupling Sign Determination and Isotope-Induced Chemical Shifts1D15/14N(29Si), 1D15/14N(119Sn) and 1D29/28Si(15N): Multinuclear Magnetic Resonance Study of N-Trimethylsilyl, -stannyl and -plumbyl Substituted2-Aminopyridines, 2,6-Diaminopyridines and of Analogous 2-Picolines“, B. Wrackmeyer, G. Kehr, H. Zhou, S. Ali, Magn. Reson. Chem. 1996, 34, 921-928.

2,5-Dihydro-1,2,5-phosphasilaborole Derivatives - Determination of Signs of Coupling Constants[1J(31P,29Si), 2J(31P,31P), J(13P,13C), J(31P,1H)]“, B. Wrackmeyer, G. Kehr, R. Köster, G.Seidel, Magn. Reson. Chem. 1996, 34, 625-630.

 

1995


Determination of Coupling Signs in Stannylated Alkynes and Allenes“, B. Wrackmeyer, G. Kehr, J. Süß, Main Group Met. Chem. 1995, 18, 127-134.

Mossbauer, Multinuclear Magnetic Resonance and Mass Spectrometric Studies of Organotin Carboxylates of m-Methyl-trans-cinnamic Acid“, S. Ali, M. Danish, M. Mazhar, A. Badshah, M. I. Chaudhary, H. G. Alt, G. Kehr, Polyhedron 1995, 14, 3115-3123.

Synthesis of 1,6-Dihalogeno-2,3,4,5-tetracarba-nido-hexaborane(6) Derivatives“, B. Wrackmeyer, G. Kehr, J. Organomet. Chem. 1995, J. Organomet. Chem. 1995, 501, 87-93.

Application of 2D Heteronuclear Shift Correlations to the Determination of Coupling Signs in Bis(trimethylstannyl)sulfide, -selenide, -telluride, Trimethylstannyl-methyl-selenide and Bis(trimethylsilyl)-selenide“, B. Wrackmeyer, G. Kehr, K. Bauer, U. Dörfler, Main Group Met. Chem. 1995, 18, 1-7.

 

1994


Determination of Absolute Signs of 119Sn-117Sn Spin-Spin Coupling Constants“, B. Wrackmeyer, G. Kehr, Z. Naturforsch. 1994, 49b, 1407-1409. Acta 1994, 220, 161-173.

 

“Trimethylsilylierte 1,4-Diborinane und 1,3-Diborolane - Bildung, Isomeren-Trennung und Charakterisierung“, R. Köster, G. Seidle, F. Lutz, C. Krüger, G. Kehr, B. Wrackmeyer, Chem. Ber. 1994, 127, 813-820.

Cyclic Bis(amino)organotin Cations, Stabilized by Õ-Coordination and New Spirocyclic Stannole Derivatives“, B. Wrackmeyer, G. Kehr, S. Ali, Inorg. Chim. Acta 1994, 216, 51-55.

Application of Hahn-Echo Extended Puls Sequences to N-Pyrrolyl-Phosphorus Compounds“, B. Wrackmeyer, G. Kehr, J. Magn. Reson. 1994, 107, 106-108.

 

1993


Exchange Reaktions between 1-Alkynyltin Compounds, Studied by 13C, 29Si and 119Sn NMR Multinuclear NMR of Tetrakis(trimethylsilylethynyl)lead and the Crystal Structures of two Tetra-1-alkynyltin Compounds“, B. Wrackmeyer, G. Kehr, D. Wettinger, W. Milius, Main Group Met. Chem. 1993, 16, 445-461.

Tetra-1-alkynyltin Compounds and Exchange Reactions with Tin Tetrachloride - 13C and 119Sn Nuclear Magnetic Resonance Study“, B. Wrackmeyer, G. Kehr, Main Group Met. Chem. 1993, 16, 305-314.

Geminal Coupling Constants 2J(15N13C) in 2-Substituted Pyridines, Measured by Hahn-Echo Extended (HEED) Pulse Sequences“, B. Wrackmeyer, G. Kehr, Z. Naturforsch. 1993, 48b, 1433-1435.

1,1-Organoboration of Di-1-alkynylsilanes with Alkynyl Groups of Different Reactivity: New Organometallic-Substituted Siloles“, B. Wrackmeyer, G. Kehr, J. Süß, Chem. Ber. 1993, 126, 2221-2226.

“Organosubstituierte 1,1´-Spirobisilole und 1,1´-Spirobigermole durch vierfache Organoborierung von Tetra-1-alkinylsilanen und -germanen“, R. Köster, G. Seidel, I. Klopp, C. Krüger, G. Kehr, J. Süß, B. Wrackmeyer, Chem. Ber. 1993, 126, 1385-1396.

 

1992


Organotin Cations Stabilized by Õ-Coordination - Synthesis and NMR Studies in Solution and in the Solid State“, B. Wrackmeyer, G. Kehr, A. Sebald, J. Kümmerlen, Chem. Ber. 1992, 125, 1597-1603.

Synthesis and Multinuclear Magnetic Resonance Studie (13C, 15N, 29Si, 119Sn) of Alkynyl(dialkylamino)tin Compounds“, B. Wrackmeyer, G. Kehr, H. Zhou, S. Ali, Main Group Met. Chem. 1992, 15/2, 89-99.

h5-Cyclopentadienyl-Derivatives of Tin(II) - Studied by Two-Dimensional Multinuclear Resonance in Solution and by 13C, and 119Sn CP/MAS NMR in the Solid State“, B. Wrackmeyer, E. Kupce, G. Kehr, A. Sebald, Magn. Reson. Chem. 1992, 30, 964-968.

Routes to Bis(amino)tin Dichlorides: Exchange Reactions between Tin(IV) Chloride and Tin(II)- and Tin(IV) Amides, and the Synthesis of a Cyclic Bis(amino)tin Dichloride from Tin(IV) Chloride and N,N´-Di-tert-butyl-1,3-diaminopropane via HCl Elimination“, B. Wrackmeyer, G. Kehr, H.Zhou, S. Ali, Inorg. Chim. Acta 1992, 197, 129-133.

13C, 15N , 29Si, 31P NMR of N-Trimethylsilylamino-Phosphorus Compounds - Sign-Determination of Various Coupling Constants - Application of Hahn-Echo Extended Pulse Sequences“, B. Wrackmeyer, E. Kupce, G. Kehr, J. Schiller, Magn. Reson. Chem. 1992, 30, 304-311.

“Organoborierung von Tetrakis(trimethylsilylethinyl)stannan - Röntgenstrukturanalyse eines 5-Stannaspiro-[4.4]nona-1,3,6,8-tetraen-Derivates“, B. Wrackmeyer, G. Kehr, R. Boese, Chem. Ber. 1992, 125, 643-650.

 

1991


“Õ-Koordination an Diorganozinn-Dikationen“, B. Wrackmeyer, G. Kehr, R. Boese, Angew. Chem. 1991, 103, 1374-1376; Angew. Chem., Int. Ed. Engl. 1991, 30, 1370-1372.

 “Peralkylated 1,4-Dibora-2,4-cyclohexadienes - Formation and Rearrangement into Peralkylated nido-2,3,4,5-Tetracarbahexaboranes(6)“, B. Wrackmeyer, G. Kehr, Polyhedron 1991, 10, 1497-1506.