SYNTHESIS AND SPECTROSCOPIC CHARACTERISATION OF Cr(III) COMPLEXES DERIVED FROM 2-BENZOYLPYRIDINE AND 2-BENZOYLTHIOPHENE WITH THIOSEMICARBAZONE AND SEMICARBAZONEAbstract
The complexes of chromium(III) are synthesised with thiosemicarbazone (L1&L3) and semicarbazone (L2) derived from 2-benzoylpyridine and 2-benzoylthiophene having general composition [CrL2X2]X (Where L=L1&L3(L1&L3= thiosemicarbazone ligand and L2= semicarbazone ligand) and X= NO3– and OAc–) have been synthesised. The complexes and ligand under study are characterised by elemental analysis, IR spectroscopy, UV-Vis spectroscopy, mass spectra, conductivity measurement, magnetic susceptibility, EPR spectral studies and NMR Spectroscopy. IR spectral study indicates that ligands behaves as bidentate and coordinated to metal ion through nitrogen, sulphur / oxygen donor atoms. The molar conductance was measured by using DMSO as solvent. The higher value of molar conductance suggests that the complexes are 1:1 electrolyte in nature. The value of magnetic susceptibility indicates that complexes are of high spin. On the basis of above spectral studies an octahedral geometry may be proposed for all the complexes.
S. Chandra * and Meenakshi Gupta
Department of Chemistry, Zakir Husain Delhi College University of Delhi, New Delhi, India.
23 November, 2016
25 March, 2017
12 May, 2017
01 June, 2017