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ESR study of free radicals in some new hydrazones of terpenoids class

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Abstract

The effect of gamma-irradiation on some new hydrazones of terpenoids using electron spin resonance (ESR) is reported. Gamma-irradiation of three derivates of hydrazone and of compounds resulting from the condensation of these derivates with terpenoids produces stable free radicals at room temperature. The analysis of the ESR parameters (g-factors and hyperfine coupling) and the simulation performed lead us to conclude that free radicals are of form R−N−NH2 (arising from hydrazine derivates) and R−N−N=R′ (arising from condensation compounds). The thermal stability of formed radicals is discussed and the activation energy involved in the process of recombination of free radicals is calculated.

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Authors and Affiliations

  1. Faculty of Physics, “Babes-Bolyai” University, Cluj-Napoca, Romania

    I. Barbur & V. Simon

  2. Faculty of Chemistry and Chemical Engineering, “Babes-Bolyai” University, Cluj-Napoca, Romania

    I. Batiu

Authors
  1. I. Barbur
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  2. I. Batiu
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  3. V. Simon
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Barbur, I., Batiu, I. & Simon, V. ESR study of free radicals in some new hydrazones of terpenoids class. Journal of Radioanalytical and Nuclear Chemistry, Articles 196, 153–160 (1995). https://doi.org/10.1007/BF02036299

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  • DOI: https://doi.org/10.1007/BF02036299

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