Abstract Treatment of dimethylsilylferrocene (1) and 1,1′-bis(dimethylsilyl)ferrocene (2) with dicobaltoctacarbonyl affords the complexes containing the Si–Co σ-bond stabilized with a ferrocenyl group. The reactions of 1 or 2 with ironpentacarbonyl and trirutheniumdodecacarbonyl give the ferrocenyl derivatives bridged with Si–M–Si (M = Fe or Ru) sequences inter- or intramolecularly.