The Synthesis by Decarboxylation Reactions and Crystal Structures of 1, n–Bis(diphenylphosphino)alkane(pentafluorophenyl)‐platinum(II) Complexes

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(C₆F₅)₂L] complexes in high yields with short reaction times. X–ray crystal structures of cis–PtCl(C₆F₅)(dppe)] · 0.5 C₅H₅N, cis–PtCl(C₆F₅)(dppp)], cis–PtCl(C₆F₅)(dppb)] · C₃H₆O, 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.