Comparative ligational, optical band gap and biological studies on Cr(III) and Fe(III) complexes of hydrazones derived from 2-hydrazinyl-2-oxo-N-phenylacetamide with both vanillin and O-vanillin

Add time:07/14/2019    Source:sciencedirect.com

The Cr(III) and Fe(III) complexes of hydrazones derived from the condensation of 2-hydrazinyl-2-oxo-N-phenylacetamide with both vanillin and o-vanillin synthesized and characterized by different conventional physicochemical techniques. The kinetic and thermodynamic parameters for the different decomposition steps were calculated using Coats–Redfern and Horowitz–Metzger equations. The bond lengths, bond angles, HOMO, LUMO, dipole moment and binding energy calculated by DFT calculations. The optical band gap (Eg) values equal 3.28, 3.03, 3.58 and 3.57 eV for [Cr(HL1)Cl2(H2O)2](0.75H2O), [Cr(HL2)Cl2(H2O)](H2O), [Fe(HL1)Cl2(H2O)2](0.5H2O) and [Fe(HL2)2Cl(H2O)](3H2O) complexes, respectively. The antibacterial activities tested against Bacillus subtilis and Escherichia coli bacteria.

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