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Title: Synthesis, crystal structure, spectroscopic and superoxide dismutase activity of copper(II) and nickel(II) complex of N '-[phenyl(pyridin-2-yl)methylidene]benzohydrazone
Authors: Patel, R N
Sondhiya, Vishnu P
Patel, Dinesh K
Shukla, K K
Singh, Y
Keywords: Coordination chemistry
Schiff bases
Keto-enol tautomerism
SOD activity
Electron paramagnetic resonance
Issue Date: 8-Dec-2012
Abstract: Two binary copper(II) and nickel(II) complexes viz., [Cu(L)(HL)]NO<sub>3</sub>.H<sub>2</sub>O (<b style="mso-bidi-font-weight:normal">1</b>)<b style="mso-bidi-font-weight: normal"> </b>and [Ni(L)(HL)]NO<sub>3</sub>.H<sub>2</sub>O (<b style="mso-bidi-font-weight: normal">2</b>)<b style="mso-bidi-font-weight:normal"> </b>of hydrazone Schiff base ligand (where L/HL = <i>N</i>'-[phenyl(pyridin-2-yl)methylidene]benzohydrazone) have been synthesized and characterized. Both the complexes (<b style="mso-bidi-font-weight:normal">1</b>) and (<b style="mso-bidi-font-weight: normal">2</b>) and ligand (HL) are structurally characterized using single crystal X-ray diffraction technique. They crystallize in monoclinic crystal system in the space group <i style="mso-bidi-font-style:normal">P2<sub>1</sub>/n</i>. The observed trends in spin-Hamiltonian parameters <i style="mso-bidi-font-style: normal">g</i><sub>║</sub>><i style="mso-bidi-font-style:normal">g</i><sub>┴</sub>>2.03 indicates a <i style="mso-bidi-font-style:normal">d</i><sub>x2-y2</sub> ground state in complex (<b style="mso-bidi-font-weight: normal">1</b>). In<b style="mso-bidi-font-weight:normal"> </b>the absorption spectra in 100% DMSO, complex (<b style="mso-bidi-font-weight:normal">2</b>)<b style="mso-bidi-font-weight:normal"> </b>exhibits a <i style="mso-bidi-font-style: normal">d</i>-<i style="mso-bidi-font-style:normal">d</i> transition at ~900 nm, which is assigned to ν<sub>1</sub> band (<sup>3</sup><i style="mso-bidi-font-style: normal">A</i><sub>2g</sub>→<sup>3</sup><i style="mso-bidi-font-style:normal">T</i><sub>2g</sub> in octahedral parentage). Superoxide dismutase activities of both complexes reveal the dismutation of superoxide (O<sup>2-</sup>).
Description: 1695-1700
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.51A(12) [December 2012]

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