Coordinative Capabilities of Acido Anions in Metal Complexes of Isatin and Vanillin Derivatives

摘要

The synthesis and characterization of two Schiff base hydrazone ligands isatin isonicotinic acid hydrazone (HIINH) and vanillin isonicotinic acid hydrazone (VINH) and their metal complexes with various salts of Cu(II) and Ni(II) are reported. The complexes have the compositions M(IINH)X or M(VINH)2X2, where X=C1, NO3or#xBD;SO4, which contain 4- or 6-coordinated metals. The complexation of the former ligand occurs in the deprotonated diol form of the ligand, via the azomethine nitrogen and the carbonyl oxygen. All complexes were characterized by elemental analysis, m. p., molar conductance measurements and infrared and electronic spectral data.