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The reactions of C 2 F 5 radicals with benzene in the vapor phase
Author(s) -
Chamberlain G. A.,
Whittle E.
Publication year - 1972
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.550040107
Subject(s) - radical , chemistry , benzene , reaction rate constant , photochemistry , vapor phase , organic chemistry , kinetics , thermodynamics , physics , quantum mechanics
C 2 F 5 radicals were generated in the presence of benzene vapor by the reaction\documentclass{article}\pagestyle{empty}\begin{document}$$({\rm C}_{\rm 2} {\rm F}_{\rm 5} {\rm CO})_2 {\rm O} + hv \to {\rm CO} + {\rm CO}_2 + 2{\rm C}_{\rm 2} {\rm F}_5 $$\end{document} The radicals react with the benzene by addition and pseudo H abstractionThe rate constant k add for the addition reaction (7) is given by\documentclass{article}\pagestyle{empty}\begin{document}$$\log k_{add} /k_{c^{1/2} } {\rm cm}^{{\rm 3/2}} {\rm mole}^{ - 1/2} \sec ^{ - 1/2} = (4.49 \pm 0.10) - (4210 \pm 150)/\theta $$\end{document} where θ = 2.303 RT cal/mole and k c is the rate constant for combination of C 2 F 5 radicals. The addition becomes reversible above 110°C. The reactions of CF 3 and C 2 F 5 radicals with benzene vapor are compared.