The synthesis by decarboxylation reactions and crystal structures of 1,n-bis(diphenylphosphino)alkane(pentafluorophenyl)-platinum(II) complexes

Article abstract of DOI:10.1002/zaac.200400465

Decarboxylation reactions between the complexes cis-[PtCl₂L] (L = 1,n-bis(diphenylphosphino)-ethane (n = 2, dppe), -propane (n = 3, dppp) or -butane (n = 4, dppb)) and thallium(I) pentafluorobenzoate in pyridine give cis-[PtCl(C₆F₅)L] and cis-[Pt(C₆F ₅)₂L] complexes in high yields with short reaction times. X-ray crystal structures of cis-[PtCl(C₆F₅)(dppe)] ·0.5 C₅H₅N, cis-[PtCl(C₆F ₅)(dppp)], cis-[PtCl(C₆F₅)(dppb)]·C ₃H₆O. cis-[Pt(C₆F₅)₂L] (L = dppe, dppp and dppb) and the reactants cis-[PtCl₂(dppp)] (as a CH₂Cl₂ solvate) and cis-[PtCl₂(dppb)] show monomeric structures with chelating diphosphine ligands in all cases rather than dimers with bridging diphosphines. ³¹P NMR data are consistent with these structures in solution.