Conclusions
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1.
The liquid-phase oxidation of N,N-diethylamide (DEA) by molecular oxygen proceeds by a radical-chain mechanism with quadratic chain termination. The rate constants for chain propagation and termination have been measured.
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2.
It has been discovered that multiple chain termination by a single antioxidant molecule occurs in DEA during oxidation. This is explained by the redox properties of the α-peroxy radicals of the amide. Aβ-CH bond is necessary for these properties to be exhibited. The rate constants and stoichiometric coefficients for inhibition by various types of antioxidant have been measured at 75°C.
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3.
The rate constants for initiation by azobisisobutyronitrile (75°C) and azobiscyclo-hexanecarbonitrile (90°C) have been measured in DEA.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2720–2725, December, 1980.
The author wishes to thank M. F. Semenova for participating in the experimental part of this work.
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Aleksandrov, A.L. β-CH regeneration of antioxidants in N,N-diethylacetamide. Russ Chem Bull 29, 1896–1901 (1980). https://doi.org/10.1007/BF00949652
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DOI: https://doi.org/10.1007/BF00949652