Russian Journal of Coordination Chemistry

, Volume 36, Issue 9, pp 644–650 | Cite as

Electrochemical transformations of catecholate and o-amidophenolate complexes with triphenylantimony(V)

  • I. V. Smolyaninov
  • A. I. Poddel’skiy
  • N. T. Berberova
  • V. K. Cherkasov
  • G. A. Abakumov


The electrochemical properties of catecholate and o-amidophenolate complexes with triphenylantimony(V) with various substituents in the aromatic ring were examined. Introduction of electron-donating groups into the catecholate ligand or replacement of an O atom (in catecholate) by a N atom (o-amidophenolate) stabilizes the monocationic forms of the complexes obtained by one-electron oxidation. Complexes with electron-withdrawing substituents undergo irreversible two-electron oxidation resulting in the elimination of o-quinone. Complexes containing electron-withdrawing ligands do not form o-semiquinones and are inert to atmospheric oxygen. According to electrochemical data, oxygen can be bound reversibly by catecholate complexes containing the electron-donating methoxy groups in the 3,6-di-tert-butylcatecholate ligand and o-amidophenolate derivatives with half-wave oxidation potentials lower than or equal to 0.70 V (vs. Ag/AgCl), which form relatively stable cationic complexes upon the oxidation.


Catecholate Triphenylantimony Electrochemical Transformation Catecholate Complex Monocationic Form 
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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • I. V. Smolyaninov
    • 1
  • A. I. Poddel’skiy
    • 2
  • N. T. Berberova
    • 1
  • V. K. Cherkasov
    • 2
  • G. A. Abakumov
    • 2
  1. 1.Southern Scientific CenterRussian Academy of SciencesRostov-on-DonRussia
  2. 2.Razuvaev Institute of Organometallic ChemistryRussian Academy of SciencesNizhni NovgorodRussia

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