Reactions of zero-valent platinum–sulphur dioxide complexes with dienes; isolation and X-ray crystal structure of a novel, µ-phenyl, µ-phosphido-, µ-sulphur dioxide triangulo-triplatinum cluster

Abstract

The complex Pt(SO2)2(PPh3)2 reacts with butadiene and isoprene to give the complexes Pt(1,2-η-C4H5R)(SO2)(PPh3)2(R = H or Me) which, on refluxing in benzene, afford high yields of the triangulo-cluster compound Pt3(µ-Ph)(µ-PPh2)(µ-SO2)(PPh3)3, characterised by a single crystal X-ray diffraction study.