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Cytotoxic, Mutagenic and Carcinogenic Potential of Heavy Metals Related to Human Environment pp 579–590Cite as

Electrochemical and Chemical Oxidation of K(C2H5OCS2), [Ni(C2H5OCS2)D And [N(C2H5)4][Ni(C2H5OCS2)3]

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Part of the book series: NATO ASI Series ((ASEN2,volume 26))

Abstract

Electrochemical and chemical oxidation of (Et-Xan−), [Ni(Et-Xan-2] and [Ni(Et-Xan)3]− (Et-Xan− = C2H5OCS2 −) have been studied by Cyclic Voltammetry and in situ UV-Vis spectroscopy in acetonitrile at room temperature. Cyclic Voltammograms (CV) of Et-Xan− and Ni(Et-Xan)2 display one (0.00 V) and two (0.35 and 0.80 V) irreversible oxidation peaks, respectively, referenced to Ag/Ag+(0.10 M) electrode. However, CV of Ni(Et-Xan)3 − displays one reversible (-0.15 V) and two irreversible (0.35, 0.80 V) oxidation peaks, respectively, referenced to Ag/Ag+ electrode. The products of constant potential electrolysis at the first oxidation peak potentials of Et-Xan” and [Ni(Et-Xan>2] are the dimer of the oxidized ligand, (Et- Xan-2 and Ni2+ (sol); and that of Ni(Et-Xan)3]− are (Et-Xan)2 and [Ni(Et-Xan)2]. Chemical oxidation of Et-Xan− and [Ni(Et-Xan)3]− with iodine to (Et-Xan)2 and (Et- Xan)2/[Ni(Et-Xan)2], were also achieved. The oxidized ligand in the dimer form can be reduced to Et-Xan− with CN− in solution. Our data do not support the formation of Ni(III) species at any oxidation stage.

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Authors and Affiliations

  1. Department of Chemistry, Middle East Technical University, 06531, Ankara, Turkey

    O. Dag, A. M. Onal & H. Isci

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  1. Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina, Greece

    Nick D. Hadjiliadis

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Dag, O., Onal, A.M., Isci, H. (1997). Electrochemical and Chemical Oxidation of K(C2H5OCS2), [Ni(C2H5OCS2)D And [N(C2H5)4][Ni(C2H5OCS2)3]. In: Hadjiliadis, N.D. (eds) Cytotoxic, Mutagenic and Carcinogenic Potential of Heavy Metals Related to Human Environment. NATO ASI Series, vol 26. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5780-3_37

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  • DOI: https://doi.org/10.1007/978-94-011-5780-3_37

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