Anomalous Paramagnetism and Binuclear Structure of some Copper (II) Complexes of 8-Hydroxyquinoline

Abstract

Fanning and Jonassen1 reported that the reaction of copper(II) halide with 8-hydroxyquinoline in methanol or acetone yields compounds of the empirical formula Cu(C9H6NO)X (X=Cl,Br) which possess magnetic moments in the range 1.0–1.1 Bohr magnetons at room temperature. They proposed an unusual tetrameric structure to explain the properties of these compounds and suggested that their anomalous paramagnetism and the presence of an absorption band at ∼375 mµ in their reflectance spectra are indicative of ‘8 bonds’ between copper atoms.