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Authors
Affiliations
1 Department of Applied Chemistry, ISM Dhanbad-826004, IN
2 Department of Chemistry, SDJ PG College, Azamgarh, UP, IN
Source
Asian Journal of Research in Chemistry, Vol 5, No 1 (2012), Pagination: 79-82
Abstract
Molybdenum and tungsten complexes of the type M2O4L2(H2O)2, where M = Mo(V), W(V), LH = N-nicotinoyl-N'-2- thiophenethiocarbohydrazide (H2NTTH), have been synthesized and characterized by using elemental analysis, magnetic susceptibility measurements, infrared spectra, 1HNMR, 13CNMR,ESR.and X-ray spectroscopic studies. Molar conductance measurements in DMF show non-ionic behaviour of all the complexes. Magnetic susceptibility measurements indicate diamagnetic nature of the complexes. Although the complexes are ESR inactive, +V oxidation state of metal ions in octahedral geometry has been suggested on the basis of electronic spectral studies. IR and electronic spectral studies indicate dinuclear - type of complexes with M2O4 2+ moiety. IR spectral data suggest monoanionic bidentate mode of bonding for the ligand. The 1H NMR and 13C NMR spectra are found to be in good agreement with the proposed stoichiometry. X-ray powder diffraction of the complexes exhibit amorphous nature of the complexes.
Keywords
Molybdenum, Tungsten, Thiocarbohydrazide Complexes.
