Chemistry of platinum sulphido-complexes. Part 5. Synthesis and crystal and molecular structure of 3-(η-cyclo-octa-1,5-diene)bis(µ 3 -sulphido)-1,1,2,2-tetrakis(triphenylphosphine)diplatinum( II )rhodium( I ) hexafluorophosphate–dichloromethane (1/1), [Pt 2 Rh(µ 3 -S) 2 (PPh 3 ) 4 (η-C 8 H 12 )]PF 6 ·CH 2 Cl 2

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.