Hydrosilylation of Alkynes by Ni(CO)3-Stabilized Silicon(II) Hydride

摘要

The chemistry of low-valent main-group compounds of the heavier Group 14 elements has been a prominent and highly challenging topic in molecular chemistry for several dec-ades. By taking advantage of steric protection through bulky substituents at the low-valent center and/or donor-acceptor stabilization, tremendous progress has been achieved over the last 30 years. Nevertheless, divalent species with element(II)-hydrogen bonds [H2E= and R(H)E:, E = Si, Ge, Sn, Pb; R = organic groups, amines] are particularly difficult to stabilize because of the lack of steric protec-tion. The first tin(II) hydride 1 without donor substituents was reported by Power et al. in 2000. This hydride has a dimeric structure with bridging hydrido ligands, even though a very large terphenyl group was employed.