Chemistry of platinum sulphido-complexes. Part 5. Synthesis and crystal and molecular structure of 3-(η-cyclo-octa-1,5-diene)bis(µ3-sulphido)-1,1,2,2-tetrakis(triphenylphosphine)diplatinum(II)rhodium(I) hexafluorophosphate–dichloromethane (1/1), [Pt2Rh(µ3-S)2(PPh3)4(η-C8H12)]PF6·CH2Cl2

Abstract

The reaction between [Pt₂(µ-S)₂(PPh₃)₄] and [{RhCl(cod)}₂](cod = cycle-octa-1,5-diene) gives [Pt₂Rh(µ₃-S)₂(PPh₃)₄(cod)]Y (Y = Cl, PF₆, or BPh₄). The molecular structure of [Pt₃Rh(µ₃-S)₂(PPh₃)₄(cod)]PF₆·CH₂Cl₂ has been determined by single-crystal X-ray techniques using diffractometer data. The compound crystallises in the monoclinic space group P2₁/c with four formula units in a cell of dimensions a= 16.681(2), b= 17.181(5), c= 27.476(2)Å, and β= 103.58(4)°. Least-squares refinement of the structure has led to a final R value of 0.043 using 6 349 observed intensities [I 3σ(I)]. The structure shows an approximately equilateral triangular arrangement of non-bonded metal atoms. The geometries at individual metal sites are approximately square planar.