Synthesis, magnetic and spectral properties of binuclear imidazolate bridged copper(II)-copper(II) and copper(II)-zinc(II) complexes

Department of Chemistry, A P. S. University, Rewa-486 003, India

Manuscript received 1 November 1999, revised 17 April 2000. accepted 26 August 2000

Two new binuclear imidazolate bridged complexes, [(PAN)Cu(im)Cu(PAN)] (ClO₄)₂ and [(PAN)Cu(im)Zn(PAN)](ClO₄)₂ (PAN =1. (2-pyridylazo)-2-naphthol, im = imidazolate) have been prepared. Room temperature magnetic susceptibility of [(PAN)Cu(im)Cu(PAN)] (ClO₄)₂ (reveals the presence of intramolecular antiferromagnetic interactions through the imidazolate bridge. X-Band EPR spectra of some Cu^II mononuclear and Cu-Zn binuclear complexes have been reported. In solution (100%, DMSO, LNT), the imidazolate bridge of the complex [(PAN)Cu(im)Zn(PAN)]²⁺ breaks on zinc side. The formation of mononucler and binuclear complexes has been confirmed by spectrometry.