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Comparison of Electrochemical Behaviour of Cu(ll), Co(ll), Ni(ll), and Fe(lll) Schiff Base Type Complexes

A. Kotočová and J. Šima

Department of Inorganic Chemistry, Faculty of Chemical Technology, Slovak Technical University, SK-812 37 Bratislava


Abstract: The electrochemical oxidation of Cu(II), Co(II), and Ni(II) complexes and reduction of Fe(III) complexes with a series of substituted N,N'-ethylenebis(monooxo-R-acetoimines) H2N2O2R2, where R = 4-OCH3C6H4, 4-CH3C6H4, C6H5, CH3, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, and 4-NO2C6H4, were investigated by cyclic voltammetry in acetonitrile and methanol solutions at a platinum electrode. The anodic peak potentials for the copper and nickel complexes varied linearly with the Taft resonance substituent constant, whereas for the cobalt and iron complexes such a relationship between the formal potentials and the Taft resonance substituent constant was not observed. The symmetry of redox orbitals is considered.

Full paper in Portable Document Format: 483a175.pdf


Chemical Papers 48 (3) 175–176 (1994)

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