Monobridged binuclear platinum complexes. Part 1. Some phosphidobridged diplatinum complexes of triethylphosphine

Abstract

The complexes [{PtX(PEt₃)₂}₂PH₂]Y (X = H, Y = Cl or Br; X = Y = Cl or Br) have been prepared, and the structures of two isomers in CDCl₃ solution have been determined by ³¹P n.m.r. spectroscopy. Both isomers are linked by single PH₂ bridges. The halide complexes partly decompose to give [(Et₃P)X₂Pt(µ-PH₂)PtX(PEt₃)₂] in CDCl₃ solution. Analogous iodide complexes have been identified from their ³¹P n.m.r. spectra but could not be isolated. The bridging PH₂ group isrelatively stable, and the spectroscopic parameters suggest that it has a greater trans influence than PEt₃ in these complexes.