Pentafluorophenyl derivatives of phosphorus, arsenic, and antimony and their complexes with rhodium, palladium, and platinum

Abstract

The compounds (C₆F₅)_nPh_3–n X (X = P, As, or Sb; n= 1, 2, or 3) have been prepared in high yield by an improved method using pentafluorophenyl-lithium. The reactions of these ligands with various rhodium, palladium, and platinum compounds have been investigated and displacement reactions indicate that the complexes L₂PtCl₂ increase in stability in the order of ligands (L), Me₂S < (C₆F₅)₃P < (C₆F₅)Ph₂As < (C₆F₅)₂PhP < tris(2,6-di-fluorophenyl)phosphine < cyclo-octa-1,5-diene < Ph₃As < (C₆F₅)Ph₂P < Ph₃P < (PhO)₃P.

The i.r. spectra (400–200 cm.^–1) and ¹⁹F n.m.r. spectra of the compounds are reported.