Abstract
Abstract The synthesis and characterization of several new oxovanadium (IV) complexes with acethydrazide (AH) and isonicotinic acid hydrazide (INH) are reported. Elemental analyses, magnetic susceptibility and electrical-conductance measurements, electronic and I.R. spectra and DTA-TGA studies have been used to characterize the compounds. The analytical data and TGA curves show that the 1:1 complexes are of the type[(VO)L]X.nH2O (X=SO= 4 or 2C1−) (L = AH or INH) while the 1:2 complexes are VOL2. I.R. espectral data show that the ligand behaves in the keto or enol form. This depends upon the reaction conditions and the pH of the medium. A square-pyramidal structure is proposed for the compounds on the basis of magnetic and spectral measurements.
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