Abstract
Kinetic manometric studies indicate that the first step in the thermal decomposition of a number of N-oxides is the formation of a cyclic activated complex. There is a correlation between the thermal stability of the compounds studied in the liquid phase and the charge on the oxygen atom of the N-oxide group calculated by the MPDP method. Autocatalysis of gas evolution from halogenopyridine N-oxides is explained by hydrogen halide autocatalysis. The limit of thermal stability for N-oxides is likely to be no greater than 270°C.
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References
Yu. Yu.Nikishev, I. Sh. Saifullin and O. R. Klyuchnikov, Kinet. Katal.,34, No. 6, 971.1 (1993).
O. R. Klyuchnikov, I. Sh. Saifullin and Yu. Yu. Nikishev, Khim. Geterotsikl. Soedin., No. 5, 564 (1994).
O. R. Klyuchnikov, Yu. Yu. Nikishev and I. Sh. Saifullin, Abstr. XIII All-Union Conf. on Chemical Thermodynamics and Calorimetry, Krasnoyarsk (1991), p. 118.
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Biisk Lyceum, Altai Region, Biisk 659302. Kazan' State Technological University, Kazan' 420015. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1573–1576, November, 1995. Original article submitted October 20, 1995.
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Klyuchnikov, O.R., Nikishev, Y.Y. Thermal stability and thermal decomposition of N-oxides. Chem Heterocycl Compd 31, 1367–1369 (1995). https://doi.org/10.1007/BF01168633
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DOI: https://doi.org/10.1007/BF01168633