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

  • O. Dag
  • A. M. Onal
  • H. Isci
Part of the NATO ASI Series book series (ASEN2, volume 26)


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.


Cyclic Voltammograms Oxidation Peak Electrochemical Oxidation Spectral Change Chemical Oxidation 
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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • O. Dag
    • 1
  • A. M. Onal
    • 1
  • H. Isci
    • 1
  1. 1.Department of ChemistryMiddle East Technical UniversityAnkaraTurkey

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