The synthesis and characterisation of di- and trinuclear vinylsilicon-(tertiary phosphine) complexes of platinum(0) and nickel(0)

Article abstract of DOI:10.1016/S0022-328X(96)06925-2

Reaction of the platinum(0) complex [{Pt(η-ViSiMe₂)₂O}₂(μ-ViSiMe₂)₂O] with a bis- or tris-tertiary phosphine yields, by displacement of the bridging vinylsiloxane ligand, complexes featuring both a bridging phosphine and a terminal vinylsiloxane. The zinc reduction of [NiCl₂(PPh₃)₂] in the presence of the vinylsilane Vi₂SiMe₂ yields a dinuclear heteroleptic nickel(0) complex having a bridging vinylsilane. X-ray molecular structures of the complexes [{Pt(LL)}₂(dppe)], [{Pt(LL) }₃(TRIPHOS)], [{ Pt(LL)}₃(TRIPHOS')] and [{Ni(μ- Vi₂SiMe₂)(PPh₃)}₂] show a trigonal planar environment around the metal atoms and a chair conformation for the Pt(LL) units [LL = (η-ViSiMe₂)₂O, dppe = (Ph₂PCH₂)₂, TRIPHOS = (Ph₂PCH₂)₃CMe, TRIPHOS' = PhP(CH₂CH₂PPh₂)₂].