New methods for synthesis of platinum(II) dimethyl sulfide complexes

Abstract Different methods for the synthesis of anionic dimethyl sulfide platinum complexes of the type Q[PtCl 3 (Me 2 S)] (Q = triphenylbenzylphosphonium, Ph 3 PBzl, or tetrabutylammonium, Bu 4 N) and [Pt(μ-Cl)Cl(Me 2 S)] 2 are reported. The compounds Q[PtCl 3 (Me 2 S)] were prepared by interaction of [PtCl 4 ] 2− with an excess of Me 2 S in non-aqueous media, reduction of [PtCl 5 (Me 2 S)] − with hydrazine sulfate, bridge-splitting reactions of (Ph 3 PBzl) 2 [Pt 2 (μ-Cl) 2 Cl 4 ] and [Pt(μ-Cl)Cl(Me 2 S)] 2 with two equivalents of Me 2 S and (Ph 3 PBzl)Cl, respectively, and substitution of dimethyl sulfide in trans -[PtCl 2 (Me 2 S) 2 ]. The [Pt(μ-Cl)Cl(Me 2 S)] 2 dimer was prepared via reaction of cis -[PtCl 2 (Me 2 S) 2 ] with two equivalents of silver nitrate followed by separation of AgCl(s) and addition of one equivalent of K 2 [PtCl 4 ]. The structure of (Ph 3 PBzl)[PtCl 3 (Me 2 S)] was determined by X-ray single crystal analysis. The compound crystallizes in the space group P 2 1 / n with a = 9.746(3), b = 19.511(4), c = 14.966(4) A, β = 100.43(2)°, V = 2799.0(9) A 3 and Z = 4.