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Polarographic study of certain N-oxide free radicals


  1. 1.

    Stable free radicals — N-oxides of 2,2,6,6-tetramethylpiperidone and 2,2,6,6-tetramethylpiperidine — are irreversibly reduced on a dropping mercury electrode to the corresponding hydroxylamine derivatives, giving one-electron, one-stage diffusion waves.

  2. 2.

    The heights of the waves do not depend on the pH; E1/2 of the waves are determined by the kinetic volume protonation of the radicals, preceding the strictly electrochemical step. The introduction of adsorbed anions (Cl, Br) into the solution, produces a displacement of E1/2 of the waves, equal to the change in the ψ1-potential.

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Literature cited

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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8 pp. 1518–1521, August, 1964

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Neimann, M.B., Mairanovskii, S.G., Kovarskaya, B.M. et al. Polarographic study of certain N-oxide free radicals. Russ Chem Bull 13, 1424–1426 (1964).

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  • Mercury
  • Free Radical
  • Hydroxylamine
  • Mercury Electrode
  • Drop Mercury Electrode