Chemistry of the metal carbonyls. Part LXII. Methylsilicon(carbonyl)ruthenium and -osmium complexes obtained from pentamethyl- and 1,1,2,2-tetramethyl-disilane

Abstract

Pentamethyldisilane reacts with the dodecacarbonyls of ruthenium and osmium to give the polynuclear complexes [Me₃SiM′(CO)₃(µ-SiMe₂)]₂(M′= Ru or Os). These same compounds also arise from the reactions of (Me₃Si)₂M′(CO)₄ with Me₅Si₂H; however, they are obtained in best yield from [Me₃MM′(CO)₄]₂(M = Si or Ge; M′= Ru. M = Si, M′= Os). 1,1,2,2 Tetramethyldisilane reacts with [Me₃MRu(CO)₄]₂(M = Si or Ge) to afford the compound Ru₂(CO)₆(µ-SiMe₂)₃. The heterocyclic complex [Me₂SiOs(CO)₃]₃ results from the reaction of Me₅Si₂H and Os(CO)₄H₂. In general, the silicon-ruthenium and silicon-osmium containing products are obtained in low yield, apparently due to the disproportionation of Me₅Si₂H and Me₄Si₂H₂ to polysilanes.