Structural and spectral studies of nickel(II) complexes with N(4),N(4)-(butane-1,4-diyl) thiosemicarbazones |
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Authors: | E Manoj MR Prathapachandra Kurup |
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Institution: | Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, Kerala, India |
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Abstract: | Nickel(II) complexes of quinoline-2-carbaldehyde N(4),N(4)-(butane-1,4-diyl) thiosemicarbazone (HL1) and 2-benzoylpyridine N(4),N(4)-(butane-1,4-diyl) thiosemicarbazone (HL2) have been synthesized and physico-chemically characterized by means of partial elemental analyses, molar conductance measurements, magnetic measurements, electronic and infrared spectral studies. Three complexes were given the formulae Ni(HL1)2]Cl2 (1), Ni(HL2)L2]ClO4 · 7H2O (2) and NiL2Cl] · 0.5H2O (3). The structure of compound 1 has been solved by single crystal X-ray crystallography and is found to be distorted octahedral. Compound 2, when crystallized in DMSO solution, got deprotonated to form a new compound Ni(L2)2] (2a), with a distorted octahedral Ni(II) center. In compound 1, HL1 coordinates to the metal in the thione form, while in compounds 2a and 3, HL2 coordinates in its deprotonated thiolate form. |
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Keywords: | Thiosemicarbazone Ni(II) complex Quinoline-2-carbaldehyde 2-Benzoylpyridine Crystal structure |
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