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

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Abstract

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.

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Authors and Affiliations

  1. Southern Scientific Center, Russian Academy of Sciences, Rostov-on-Don, Russia

    I. V. Smolyaninov & N. T. Berberova

  2. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, ul. Tropinina 49, Nizhni Novgorod, Russia

    A. I. Poddel’skiy, V. K. Cherkasov & G. A. Abakumov

Authors
  1. I. V. Smolyaninov
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  2. A. I. Poddel’skiy
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  3. N. T. Berberova
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  4. V. K. Cherkasov
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  5. G. A. Abakumov
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Corresponding author

Correspondence to A. I. Poddel’skiy.

Additional information

Original Russian Text © I.V. Smolyaninov, A.I. Poddel’skiy, N.T. Berberova, V.K. Cherkasov, G.A. Abakumov, 2010, published in Koordinatsionnaya Khimiya, 2010, Vol. 36, No. 9, pp. 650–657.

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Smolyaninov, I.V., Poddel’skiy, A.I., Berberova, N.T. et al. Electrochemical transformations of catecholate and o-amidophenolate complexes with triphenylantimony(V). Russ J Coord Chem 36, 644–650 (2010). https://doi.org/10.1134/S1070328410090022

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  • DOI: https://doi.org/10.1134/S1070328410090022

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