Indian Journal of Science and Technology

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The bond length, bond angle, HOMO, LUMO, dipole moment and charges on the atoms have been calculated to confirm the geometry of (E1, E2) N1,N2 - bis[1-(3,4-dihydroxyphenyl)ethylidene]oxalohydrazide, H6DPOH. The metal complexes of Cr3+, VO2+, ZrO2+, HfO2+, UO2 2+ and MoO2 2+ with H6DPOH have been prepared and characterized by partial elemental analysis, spectral studies (electronic; IR), thermal analysis and magnetic measurements. The data suggest the formation of [Cr(H4DPOH)(H2O)3Cl]H2O, [VO(H4DPOH)(H2O)2], [Hf(H4DPOH)(H2O)]H2O [UO2(H4DPOH)(H2O)2]2H2O [MoO2(H4DPOH)] and [(ZrO)2(H2DPOH)(C2H5OH)2]. H6DPOH behaves as a dibasic bidentate in all complexes except ZrO2+ which acts as a tetrabasic tetradentate for the two ZrO2+ ions. An octahedral geometry was proposed for the Cr3+, HfO2+, MoO2 2+and UO2 2+ complexes and square pyramid for VO2+. The Cr(III) or VO2+ complexes are necessary to degrade the DNA of Eukaryotic subject completely; the other complexes have little effect. H6DPOH was found applicable as a new reagent for the separation and preconcentration of ZrO2+ ions from different water samples using flotation technique with satisfactory results.

Keywords

(E1, E2) N1,N2 - bis[1-(3,4-dihydroxyphenyl) ethylidene]oxalohydrazide
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