Synthesis and spectral studies of copper(II) and nickel(II) complexes of isomeric and heterocyclic benzoylhydrazones

Abstract

Copper(II) and nickel(II) complexes of benzoic acid [(furan-2-yl)methylene]hydrazide (BFMH), benzoic acid [I-(furan-2-yl)ethylidene]hydrazide (BFEH), benzoic acid [(thiophen-2- yl)methylene hydrazide (BTMH), benzoic acid [I-(thiophen-2-yl)ethylidene]hydrazide (BTEH), 2-furanyl carboxylic acid (benzylidene)hydrazide (FCBH) and 2-thiophenyl carboxylic acid (benzylidene) hydrazide (TCBH) have been synthesized and characterized by elemental analysis, conductivity, magnetic susceptibility measurements, IR, electronic and ESR spectral data. The electronic spectral data and the magnetic moment value suggest an octahedral structure for all nickel(II) complexes, planar geometry for copper complexes of BFMH, BTMH, FCBH and TCBH ligands and an octahedral geometry for the copper{II) complexes with BFEH and BTEH ligands.