Novel insertions of carbene homologs into Metal-Eta-5-Cp bonds : sandwich complexes with Ge2Ni and Sn2Ni cores

Abstract

An unsymmetrical bridging Cp(~)ligand is the striking structural element in 1. Compound 1 can be considered as an intermediate of the reaction in which GeMe2Si(NtBu)2 attacks [Cp2Ni] as a Lewis acid, and inserts into the Ni-Cp bond. The analogous Sn complex has a symmetric structure.(~)