ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
CF3 radicals were generated by the photolysis of perfluoroacetic anhydride. In the presence of pentafluorobenzene, the CF3 radicals react according to the following mechanism: It was found that the addition reaction (3) becomes reversible above ca. 453 K. The addition rate parameters have been revised and they satisfactorily agree with those reported previously.At temperatures higher than 593 K, only true H-abstraction occurs. The rate constant kH for reaction (5) is given by: \documentclass{article}\pagestyle{empty}\begin{document}$$ \log [(k_{\rm H} /k_c^{1/2}){\rm mol}^{- 1/2} \,{\rm cm}^{{\rm 3/2}} \,{\rm s}^{{\rm - 1/2}}]\, = \,(4.34\, \pm \,0.43)\, - \,(59,00\, \pm \,2.62)/\theta $$\end{document} where θ = 2.303 RT kJmol-1 and kc is the rate constant for combination of CF3 radicals. The reactions of CF3 with benzene and pentafluorobenzene are compared.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550230502
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