Synthesis,characterization and structural assessment of nitrato,chloro, bromo,perchlorato, thiocyanato and sulphato mono-(benzoin thiosemicarbazonato) copper(II) complexes |
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| Authors: | Krishan K Narang Ram A Lal Ram K Thapa Vijai K Gautam |
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| Institution: | (1) Department of Chemistry, Banaras Hindu University, 221005 Varanasi, (UP), India;(2) Department of Chemistry, Pachhunga University College, North-Eastern Hill University, 796001 Aizawl, Mizoram, India;(3) Department of Physics, Pachhunga University College, North-Eastern Hill University, 796001 Aizawl, Mizoram, India |
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| Abstract: | Summary Some copper(II) complexes of the type Cu(HL)X·nH2O (where H2L = benzoin thiosemicarbazone; X=NO3; Cl, Br, SCN, ClO4 or 1/2SO4; n=O–2) have been prepared and characterized. All complexes have tetragonally distorted octahedral stereochemistry except the sulphatocomplex which is square pyramidal. The i.r. spectra reveal that HL acts as a monobasic tridentate ligand coordinating through the azine group nitrogen atom, thiocarbonyl sulphur atom and hydroxylic oxygen atom while NO3, Cl, Br and ClO4 act as terminal monodentate ligands and SCN and SO4 act as bidentate bridging ligands. The polycrystalline e.s.r. spectra suggest tetragonal symmetry for the copper(II) ion, involving a dx
2–y2 ground state. |
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