Bis(pentamethylcyclopentadienyl)silylene as Ligand in Gold(<scp>I</scp>) Chloride Complexes

Abstract

The first real silylene complex was obtained by reaction of decamethylsilicocene 1 with carbonylgold( I ) chloride. To reduce the electron deficit at the silicon in 2 , one of the two cyctopentadienyl ligands remains π‐bonded. The deep‐red silylene complex 2 resembles the Fischer carbene complexes. Addition of pyridine or tert ‐butyl isocyanide leads to the donor‐stabilized silylene complexes of the type (Me 5 C 5 ) 2 Si(donor)–AuCl, in which both cyclopentadienyl ligands are σ‐bound. equation image