Synthesis and structure of some cobalt(III) complexes with azide, dimethylglyoxime and heterocyclic nitrogen donor ligands

Abstract

A series of new hydrogen bonded trans-azidocobaloxime of the type [Co(DH) 2 N 3 L] where DH = dimethylglyoximato anion, L = [pyridine, piperidine, piperazine, quinoline, iso-quinoline, triazole, indole, benzimidazole, benzotriazole, or carbazole] have been prepared by passing air in cobalt(II) acetate, sodium azide, dimethylglyoxime and heterocyclic nitrogen donor ligands in ethanol medium. The complexes are characterized by UV, IR, NMR spectra. The thermogravimetric analyses indicate that these compounds are quite stable upto 200 and never associated with solvent or water molecules.