Synthesis, characterization and antimicrobial activity of 3d transition metal complexes of a biambidentate ligand containing quinoxaline moiety |
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| Authors: | P.V. Anantha Lakshmi P. Saritha Reddy V. Jayatyaga Raju |
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| Affiliation: | aDepartment of Chemistry, University College for Women, Osmania University, Koti, Hyderabad, Andhra Pradesh, 500095, India;bDepartment of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia |
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| Abstract: | A new series of oxovanadium(IV), chromium(III), manganese(II), iron(III), cobalt(II), nickel(II), and copper(II) complexes of the 3-hydrazino quinoxaline-2-one (HQO) were prepared and characterized. The ligand exhibits biambidenticity. It behaves as a bidentate ON donor in oxovanadium(IV), iron(III) and copper(II) complexes and as a bis bidentate ONNN donor in chromium(III), manganese(II), cobalt(II) and nickel(II) complexes. The nature of bonding and the stereochemistry of the complexes have been deduced from elemental analyses, thermal, infrared, 1H NMR, electronic spectra, magnetic susceptibility and conductivity measurements. An octahedral geometry was suggested for all the complexes. All the complexes show subnormal magnetic moments. The ligand, HQO, and its complexes were tested against one strain Gram +ve bacteria (Staphylococcus aureus), Gram −ve bacteria (Escherichia coli). The prepared metal complexes exhibited higher antimicrobial activities than the parent ligand. |
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| Keywords: | Bis bidentate donor Subnormal magnetic moments Octahedral geometry Antimicrobial activity |
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