Some mixed-ligand complexes of copper(II)

Abstract

Bis(salicybidehydato) copper(II), (sal)₂Cu, reacts with 1 mol of the amine H₂;NCH₂,CH₂,NR₂, to give rise to complexes of formula (sal)(salNR₂)Cu where salNR₂, is the Schiff base derived from sal and H₂;NCH₂,CH₂,NR₂,. Similar reactions also occur with bis(2-hydroxyacetophenonato)copper(II). The mixed.ligand complexes are characterized using analytical. infrared, and molecular weight data. They have normal magnetic moments. On the basis of electronic spectra it is suggested that they have pentacoordinated geometry. When these mixed-ligand complexes are treated with HCI or HBr. the biden-tate moiety (e.g., sal) is replaced by halide ion: the resultant complexes being planar. A mechanism for this reaction is suggested. From the halide, the corresponding nitrate and perchlorate can be obtained by double decomposition. The probable structures of these species are discussed In the light of conductivity, infrared, magnetic, and electronic spectral data.