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New complexes of N-isonicotinamido-4-chlorobenzalaldimine (INHCBA) with Cu(II), Co(II) and Cd(II), having formula of the type (M(INHCBA)(ac)2)·xH2O (M = Cu 2+ , x = 1, M = Co 2+ , x = 2, M = Cd 2+ , x = 0, ac = CH3COO - ), and with Cu(II), Mn(II) and Zn(II), having formula of the type (M(INHCBA)2(H2O)2)SO4·xH2O (M = Cu 2+ , Mn 2+ , x = 2 and Zn 2+ x = = 2.5) were synthesized and characterized by analytical and physico-chemical techniques, i.e., elemental analyses, IR, UV-Vis-NIR and EPR spectroscopy as well as thermal analysis and the determination of the molar conductivity and magnetic moments. The thermal behaviour of complexes was studied by ther- mogravimetry (TG), differential thermal analysis (DTA) and differential scan- ning calorimetry (DSC). The ligand behaves as bidentate NO, being coordi- nated through the azomethine nitrogen and carbonylic oxygen. The heats of decomposition, ΔH, associated with the exothermal effects, were also deter- mined.

Synthesis and characterization of new complexes of some divalent transitional metals with isonicotinamido-4-chlorobenzalaldimine