Synthesis and characterization of new sulfide aggregates of the type [{Pt2(μ3-S)2(P–P)2}M(C6F5)2] (M=Ni, Pd, Pt; P–P=2PPh3, 2PMe2Ph, dppf)

The reaction of [Pt2(μ-S)2(P–P)2] (P–P=2PPh3, 2PMe2Ph, dppf) [dppf=1,1′-bis(diphenylphosphino)ferrocene] with cis-[M(C6F5)2(PhCN)2] (M=Ni, Pd) or cis-[Pt(C6F5)2(THF)2] (THF=tetrahydrofuran) afforded sulfide aggregates of the type [{Pt2(μ3-S)2(P–P)2}M(C6F5)2] (M=Ni, Pd, Pt). X-ray crystal analysis revealed that [{Pt2(μ3-S)2(dppf)2}Pd(C6F5)2], [{Pt2(μ3-S)2(PPh3)2}Ni(C6F5)2], [{Pt2(μ3-S)2(PPh3)2}Pd(C6F5)2] and [{Pt2(μ3-S)2(PMe2Ph)2}Pt(C6F5)2] have triangular M3S2 core structures capped on both sides by μ3-sulfido ligands. The structural features of these polymetallic complexes are described. Some of them display short metal–metal contacts.