SYNTHESIS AND SPECTRAL STUDIES OF COPPER(II) AND NICKEL(II) COMPLEXESOF ISOMERIC AND HETEROCYCLIC BENZOYLHYDRAZONES

Copper(II) and nickel(II) complexes of benzoic acid [(furan-2-yl)methy lene]hydrazide (BFMH), benzoic acid [1-(furan-2-yl)ethylidene]hydrazid e (BFEH), benzoic acid [(thiophen-2-yl)methylene hydrazide (BTMH), ben zoic acid [1-(thiophen-2-yl)ethylidene]hydrazide (BTEH), 2-furanyl car boxylic acid (benzylidene)hydrazide (FCBH) and 2-thiophenyl carboxylic acid (benzylidene)hydrazide (TCBH) have been synthesized and characte rized by elemental analysis, conductivity, magnetic susceptibility mea surements, IR, electronic and ESR spectral data. The electronic spectr al data and the magnetic moment value suggest an octahedral structure for all nickel(II) complexes, planer geometry for copper complexes of BFMH, BTMH, FCBH and TCBH ligands and an octahedral geometry for the c opper(II) complexes with BFEH and BTEH ligands.