Free-radical chain oxidation of 1,4-dioxane inhibited by 2-thio-6-aminouracil


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Abstract

The effect of 2-thio-6-aminouracil on the oxygen uptake kinetics has been studied in 1,4-dioxane free-radical chain oxidation as a model system. The presence of a thiocarbonyl group in the 2-position of the uracil ring makes 6-aminouracil highly reactive towards 1,4-dioxane peroxy radicals. The rate constant of the 1,4-dioxane peroxy radical interaction with 2-thio-6-aminouracil has been measured to be k7 = (3.0 ± 0.5) × 105 L mol–1 s–1 (333 K). The stoichiometric inhibition factor f = 1.1 ± 0.1 has been determined.

About the authors

R. A. Nasibullina

Ufa Institute of Chemistry

Email: jkupova@anrb.ru
Russian Federation, Ufa, 450054

A. R. Gimadieva

Ufa Institute of Chemistry

Email: jkupova@anrb.ru
Russian Federation, Ufa, 450054

L. R. Yakupova

Ufa Institute of Chemistry

Author for correspondence.
Email: jkupova@anrb.ru
Russian Federation, Ufa, 450054

R. L. Safiullin

Ufa Institute of Chemistry

Email: jkupova@anrb.ru
Russian Federation, Ufa, 450054

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