Notes. Dependence of metal–halogen vibrational frequency on the metal co-ordination number in some Group 1B metal halide complexes MX(PPh3)n

Abstract

Metal–halogen vibrational frequencies have been assigned in the i.r. and Raman spectra of the compounds MX(PPh₃)_n(n= 2, M = Au, X = Cl, Br or I; n= 3, M = Au, X = Cl; n= 2, M = Cu, X = Cl or Br) in the range 100–300 cm^–1. The results show that the frequencies have the expected dependence on metal co-ordination number, and confirm that the compounds AuX(PPh₃)₂(X = Br or I) contain three-co-ordinate gold.