Silylation of N-heterocyclic carbene with aminochlorosilane and -disilane: dehydrohalogenation vs. Si-Si bond cleavage

Reactions of the aminochlorosilane RSiHCl2 and disilane R2Si2HCl3 (R = (2,6-iPr(2)C(6)H(3))(SiMe3)N) with an excess of 1,3-bis(tert-butyl)imidazol-2-ylidene resulted in the silylation of the NHC while reaction with the less hindered 1,3-diisopropyl-4,5-dimethyl-imidazol-2-ylidene yielded an NHC-stabilized aminochlorosilylene.