Transmetallation reactions of [Sn(R)2(Ph2PC6H4-2-S)2] with metal complexes of the Group 10

The complexes cis -[M(Ph 2 PC 6 H 4 -2-S) 2 ] M=Ni, Pd, Pt were stereoselectively synthesized by transmetallation reactions of [M(Cl) 2 (NCC 6 H 5 ) 2 ] M=Pd, Pt or NiCl 2 ·6H 2 O with [Sn(R) 2 (Ph 2 PC 6 H 4 -2-S) 2 ] R=Ph, n Bu or t Bu. The conformation of the Pd and Pt derivatives being unequivocally confirmed by single crystal X-ray diffraction studies showing both metal centers to be into a slightly distorted square planar environment, the main distortion being due to the steric hindrance caused by the aromatic rings in the phosphine moiety.