Structure and magnetic characteristics of new binuclear complexes based onbisbenzoylhydrazones of 2,6-diformyl-4-R-phenols and copper(II) nitrate

A series of binuclear Cu(II) complexes with bisbenzoylhydrazones of 2,6-dif ormyl-4-R-phenols (R = OCH3, CH3, CH2Ph, Cl, Br, CO2CH3) with H2LCu2(NO3)(2 )(OCH3) composition, where H2L- are monodeprotonated bishydrazones, was syn thesized. The structure of the obtained complexes was established using IR spectroscopy and conductometric and magnetochemical data. The title complex es were shown to exhibit exchange interaction of the antiferromagnetic type . Results of quantum-chemical calculations of structures modeling the state of a ligand in the complex were used to discuss the effect of substituent R nature on magnetic exchange in the complexes.