Bis(pentamethylcyclopentadienyl)silylene as Ligand in Gold(I) 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 (Me5C5)2Si(donor)–AuCl, in which both cyclopentadienyl ligands are σ‐bound. equation image