Some novel µ-sulphido- and tetrasulphido-complexes of platinum(II)

Abstract

The binuclear and trinuclear µ-sulphido-complexes [Pt₂S₂(PMe₂Ph)₄] and [Pt₃S₂(PMe₂Ph)₆]Cl₂ have been prepared by the reaction of sodium sulphide and cis-dichlorobis(dimethylphenylphosphine)platinum(II). Their properties, reactions, and structures are discussed in this paper. In ammoniacal ethanol solution sodium sulphide reacts with cis-[PtCl₂(PPh₃)₂] to give the complex [Pt₂S(PPh₃)₄], probably structurally analogous to [Pt₂S(CO)(PPh₃)₃]. The platinum(0) and palladium (0) complexes ML₄[M = Pd or Pt, L = PPh₃, L₂=(PPh₂)₂C₂H₄] by oxidative addition of elemental sulphur give the complexes [L₂MS₄], which contain the novel MS₄ ring system.