Synthesis, spectral characterizations and biological studies of transition metal mixed ligand complexes: X-ray crystal structures of [Cu(oda)(Bipy)(H2O)]·4H2O and [VO(oda)(Bipy)]·2H2O

The ternary complexes of stoichiometries [M(oda)(Bipy)H2O]·xH2O [M = Cu (1), x = 4; Co (2), x = 2; Ni (3), x = 4 or Cr (4), x = 3] and [VO(oda)(Bipy)]·2H2O (5), where H2oda = oxydiacetic acid and Bipy = 2,2′-bipyridine, were prepared and characterized employing elemental, FAB-Mass, FT-IR, EPR, 1H and 13C NMR spectroscopic analyses. X-ray crystallography of (1) and (5) indicated a six coordinate distorted geometry. The antimicrobial activities of the complexes were investigated against Escherichia coli (k-12), Bacillus subtilis (MTC-121), Staphylococcus aureus (IOASA-22), Salmonella typhymurium (MTCC-98), Candida albicans, Aspergillus fumigatus and Penicillium marneffei. The superoxide dismutase (SOD) mimic activity of the Cu(II) complex (1) was assessed employing NBT assay.