The reactivity of the dinuclear halo-bridged cycloplatinated complex [Pt(m-Cl){(k2-P,C)P(OC6H4)(OPh)2}]2 towards neutral ligands

The reactivity of (cis- þ trans-)[Pt(m-Cl){(k2-P,C)P(OC6H4)(OPh)2}]2 (1) towards several ligands L (L ¼ RCN, P(OMe)3, DMSO, NHEt2, py, CO, C2H4, C8H16) has been studied. Ethylene and 1-octene do not react while the other reactions proceed with cleavage of the halide bridge and formation of one or both geometrical isomers of [PtCl{(k2-P,C)P(OC6H4)(OPh)2}L] (2e8) depending on the nature of the entering ligand. In some cases equilibrium reactions (L ¼ RCN, DMSO, CO, py) were observed. The structures of [SP4-3]-[PtCl {(k2-P,C)P(OC6H4)(OPh)2}(S)DMSO] ([SP4-3]-4) and [SP4-4]-[[PtCl{(k2-P,C)P(OC6H4)(OPh)2}py] ([SP4-4]-6) are reported.