The bonding of carbon disulphide to transition metals: the crystal structure of (carbon disulphide)bis(triphenylphosphine)platinum(0)

Abstract

(Carbon disulphide)bis(triphenylphosphine)platinum(0) crystallises in the monoclinic system with a= 11·50, b= 19·43, c= 14·22 Å, β= 91·13°, space group P2₁/n, and Z= 4. A least-squares refinement of atomic positional and thermal parameters, based on 1360 reflexions measured on a PAILRED diffractometer, has converged the discrepancy index to 0·088. The mean values of σ are 0·013 (Pt–P and Pt–S), 0·04 (P–C and S–C), and 0·05 Å(C–C). Co-ordination of the carbon disulphide drastically modifies its geometry and this fact is discussed in relation to the contribution of excited state and ionic wavefunctions of the molecular fragment to the total molecular wavefunction. The two platinum–phosphorus bond lengths of 2·346 and 2·240 Å are significantly different and are related to the differing trans-bond weakening effects of carbon and sulphur.