Stabilisation of copper(II) tertiary-phosphine or -arsine complexes. Part 1. Complexes of copper(II) with hybrid oxygen–arsenic ligands from o- and p-(diphenylarsino)benzoic acids

Abstract

Oxygen–arsenic hybrid ligands from o- and p-(diphenylarsino)benzoic acids have been used to prepare 20 stable copper(II)–arsine complexes which have been characterised with the help of elemental analysis, t.g.a. (thermal gravimetric analysis), d.t.a. (differential thermal analysis), room temperature magnetic susceptibility, i.r. and u.v.-visible spectral data. An attempt has been made to explain the earlier failures to prepare such complexes, which invariably led to the formation of either copper(I)–arsine or copper(II)–arsine oxide complexes.