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An evaluation of the kinetic parameters for the reaction of trifluoromethyl radicals with CH 3 Cl in the gas phase in the temperature range from 416 to 636 K
Author(s) -
Taccone R. A.,
Olleta A.,
Salinovich O.
Publication year - 1993
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550250504
Subject(s) - chemistry , radical , hexafluoroacetone , arrhenius equation , hydrogen atom , hydrogen atom abstraction , atmospheric temperature range , photochemistry , reaction rate constant , photodissociation , chlorine , chlorine atom , gas phase , hydrogen , trifluoromethyl , kinetics , medicinal chemistry , activation energy , organic chemistry , thermodynamics , physics , quantum mechanics , alkyl
The hydrogen and chlorine atom abstraction reactions from CH 3 Cl by CF 3 radicals produced by the photolysis of hexafluoroacetone (HFA) and CF 3 I were studied relative to the recombination of CF3 radicals (I)The Arrhenius parameters obtained in the temperature range 416 to 578 K are:\documentclass{article}\pagestyle{empty}\begin{document}$$ Logk_3 /k_2^{1/2} [{\rm cm}^{3/2} {\rm mol}^{ - 1/2} s^{ - 1/2}] = (5.39 + 0.10) - (10490 + 150)/\theta $$\end{document}\documentclass{article}\pagestyle{empty}\begin{document}$$ Logk_4 /k_2^{1/2} [{\rm cm}^{3/2} {\rm mol}^{ - 1/2} s^{ - 1/2}] = (4.52 + 0.11) - (13370 + 250)/\theta $$\end{document}where Θ = 2,303. RT cal mol −1 and k 2 is the recombination rate constant for the CF 3 radicals. The factors that influence the transfer processes of chlorine and hydrogen are analyzed in a series of reactions of halomethanes with CF 3 and CH 3 radicals. © 1993 John Wiley & Sons, Inc.