Thiolato-bridged “Linear” trinuclear platinum complexes [Pt3(μ-SR)4(dppm)2]2+

Thiolato-bridged tri- and dinuclear platinum complexes of the types [Pt3(μ-SR)4(dppm)2]2+ (1) and [Pt2(μ-ER)2(dppm)2]2+ (2) (E=S or Se; R=alkyl or aryl; dppm=bis(diphenylphosphino)methane) have been prepared using the mononuclear precursors [Pt(ER)2(dppm)]. The complexes have been characterized by NMR (1H, 13C, 31P, 195Pt), FT-IR and FAB mass spectral data. The structure of [Pt3(μ-SC6H4CH3-4)4(dppm)2][CF3SO3]2 · 6CH2Cl2 (1d), has been established through X-ray crystallography, revealing a zig-zag arrangement of the three coordination spheres around the platinum atoms.