An NHC‐Stabilized H<sub>2</sub>GeBH<sub>2</sub> Precursor for the Preparation of Cationic Group 13/14/15 Hydride Chains
Matthias T. Ackermann, Michael Seidl, Fuwei Wen, Michael J. Ferguson, Alexey Y. Timoshkin, Eric Rivard, Manfred Scheer
Abstract
Abstract The synthesis, characterization and reactivity studies of the NHC‐stabilized complex IDipp ⋅ GeH 2 BH 2 OTf ( 1 ) (IDipp=1,3‐bis(2,6‐diisopropylphenyl)imidazolin‐2‐ylidene) are reported. Nucleophilic substitution of the triflate (OTf) group in 1 by phosphine or arsine donors provides access to the cationic group 13/14/15 chains [IDipp ⋅ GeH 2 BH 2 ERR 1 R 2 ] + ( 2 E=P; R, R 1 =H; R 2 = t Bu; 3 E=P; R=H; R 1 , R 2 =Ph; 4 a E=P; R, R 1 , R 2 =Ph; 4 b E=As; R, R 1 , R 2 =Ph). These novel cationic chains were characterized by X‐ray crystallography, NMR spectroscopy and mass spectrometry. Moreover, the formation of the parent complexes [IDipp ⋅ GeH 2 BH 2 PH 3 ][OTf] ( 5 ) and [IDipp ⋅ GeH 3 ][OTf] ( 6 ) were achieved by reaction of 1 with PH 3 . Accompanying DFT computations give insight into the stability of the formed chains with respect to their decomposition.