SYNTHESIS OF MONOMERIC AND OLIGOMERIC BIS(ACETYLIDE) COMPLEXES OF PLATINUM AND RHODIUM

Treatment of the complexes trans-[M(PBu3)2Cl2] (M = Ni, Pd or Pt) with one equivalent of the reagent Me3SnC = C-R-C = CSnMe3 (R = p-C6H4) affords the polymeric species trans-[-M(PBu3)2-C = C-R-C = C-]n, whereas if two equivalents of the tin reagent are used in this reaction, when M = Pt, the complex trans-[Me3SnC = C-R-C = C-Pt(PBu3)2-C = C-R-C = CSnMe3] may be isolated, a precursor for further syntheses; the complex mer-trans-[Rh(PMe3)3(SnMe3)(C = CPh)2] has been prepared by the addition of Me3SnC = CPh to [Rh(PMe3)4][Cl], and this latter species, when treated with Me3SnC = C-R'-C = CSnMe3 (R' = p-C6H4-C6H4-p), affords the oligomeric compound mer-trans-[-Rh(PMe3)3(SnMe3)-C = C-R'-C = C-]n.