Synthesis and characterisation of mono- and binuclear palladium and platinum complexes with organochalcogenides

Abstract

Mononuclear palladium and platinum complexes of the type M(ER) 2(P ∩P) [M = Pd or Pt; ER = SPh, SC 6H 4Cl-4, SC 6H 4Me-4, SC 6F 5, SePh, TeC 6H 4OEt-4; P ∩P = dppm or dppe] have been prepared and their ability to form dinuclear metal species has been demonstrated. All complexes have been characterised by multinuclear magnetic resonance ( 1 H , 13 C , 77 Se , 195 Pt ) spectral data. The effects of phosphine ligands and organochalcogenides are reflected in the 77 Se and 195 Pt NMR shifts. The shielding of 195 Pt NMR chemical shifts has been interpreted in terms of their binding ability to platinum. The structures of two derivatives, namely [Pd(SC 6F 5) 2(dppe)] and [Pd(SePh) 2(dppe)], have been established by X-ray crystallography. The palladium atom in each of the monomeric structures exists in a square planar geometry.