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Synthesis, characterization and antimicrobial activity of 3d transition metal complexes of a biambidentate ligand containing quinoxaline moiety.

Authors
  • Anantha Lakshmi, P V1
  • Reddy, P Saritha
  • Raju, V Jayatyaga
  • 1 Department of Chemistry, University College for Women, Osmania University, Koti, Hyderabad, Andhra Pradesh, 500095, India. [email protected] , (India)
Type
Published Article
Journal
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
Publication Date
Sep 15, 2009
Volume
74
Issue
1
Pages
52–57
Identifiers
DOI: 10.1016/j.saa.2009.05.007
PMID: 19539520
Source
Medline
License
Unknown

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, (1)H 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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