Complexes of the dicyclohexylphosphinodithioformate anion involving the nickel triad metals: the crystal and molecular structures of the platinum(II) and palladium(II) derivatives

Abstract

The crystal and molecular structures of bis (dicyclohexylphosphinodithioformato-S,P)M, M[S₂CP-(C₆H_l1)₂]₂ where M = Pt (1) and Pd (2), have been determined by single-crystal three-dimensional X-ray diffraction methods. The isomorphous crystals are monoclinic, of space group P2₁/c with four molecules per unit cell which has dimensions for (1) a 14.732(4), b 15.11 8(4), c 16.000(3) Å and β 120.90(2)º and for (2) a 14.721(2), b 15.142(2), c 15.986(2) Å and β 120.80(1)º.

The structures were solved by normal Fourier methods and were refined with anisotropic thermal parameters. A full-matrix least-squares method was used, involving 3454 and 5052 statistically significant reflections for (1) and (2) respectively with final R and R_w values of 0.058 and 0.055 for (1) and 0.038 and 0.039 for (2).

The complexes are isostructural. The ligand coordinates in a bidentate manner to the central atom through the phosphorus atom and one of the sulfur atoms with the metal atom in a cis-planar environment.