Synthesis,spectral, thermal,and antibacterial investigation of mixed ligand complexes of oxovanadium(IV) |
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Authors: | B T Thaker K R Surati C K Modi |
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Institution: | (1) Department of Chemistry, Veer Narmad South Gujarat University, Surat, 395007, India;(2) Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, 388120 Gujarat, India |
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Abstract: | Novel mononuclear mixed-ligand oxovanadium(IV) complex VO(PMFP)(Bipy)]ClO4 was prepared by the condensation of VOSO4 · 5H2O with ligands 1-phenyl-3-methyl-4-formyl-2-pyrazolin-5one (PMFP) and 2,2′-bipyridyl (Bipy). The corresponding Schiff bases
were prepared by the condensation of VO(PMFP)(Bipy)]ClO4 with ethylenediamine, ethanolamine, and glycine. All the compounds have been characterized by elemental analysis, magnetic
susceptibility, X-ray crystallography, conductometry measurement, 1H NMR, FT-IR, ESR, electronic spectra, and mass spectrometry. Electronic spectra and magnetic susceptibility measurements
indicate distorted octahedral stereochemistry of the oxovanadium(IV) complexes. Thermal stability, kinetic order, heat capacity,
and activation energy of thermal degradation of these complexes were determined by TGA and DSC. The presence of one coordinate
water molecule is suggested from the IR and TGA studies. Hamiltonian and bonding parameters were found from ESR spectra, indicating
that the metal-ligand bonding is partial covalent. Antibacterial screening is reported for the ligand and complexes of oxovanadium(IV).
The text was submitted by the authors in English. |
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