Synthesis of monomeric and oligomeric bis(acetylide) complexes of platinum and rhodium

Abstract

Treatment of the complexes trans-[M(PBu₃)₂Cl₂](M = Ni, Pd or Pt) with one equivalent of the reagent Me₃SnCC–R–CCSnMe₃(R =p-C₆H₄) affords the polymeric species trans-[–M(PBu₃)₂-CC–R–CC–]_n, where as if two equivalents of the tin reagent are used in this reaction, when M = Pt, the complex trans-[Me₃SnCC–R–CC–Pt(PBu₃)₂-CC–R–CCSnMe₃] may be isolated, a precursor for further syntheses; the complex mer-trans-[Rh(PMe₃)₃(SnMe₃)(CCPh)₂] has been prepared by the addition of Me₃SnCCPh to [Rh(PMe₃)₄][Cl], and this latter species, when treated with Me₃SnCC–R′–CCSnMe₃(R′=p-C₆H₄–C₆H₄–p), affords the oligomeric compound mer-trans-[–Rh(PMe₃)₃(SnMe₃)–CC–R′–CC–]_n.