Gas phase reaction of heptafluoroisopropyl radicals with carbon tetrachloride

The reactionwas investigated in the gas phase over the range 80–225°C using the photolysis of heptafluoroisopropyl iodide as the source of radicals. The rate constant, based on the value of 10 13.36 cm 3 mol −1 s −1 for the recombination of i ‐C 3 F 7 radicals, is given by\documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm log(}{{k_3 } \mathord{\left/ {\vphantom {{k_3 } {{\rm cm}^{\rm 3} }}} \right. \kern-\nulldelimiterspace} {{\rm cm}^{\rm 3} }}{\rm mol}^{ - 1} {\rm s}^{ - 1}) = (13.10 \pm 0.20) - {{(14000 \pm 280)} \mathord{\left/ {\vphantom {{(14000 \pm 280)} \theta }} \right. \kern-\nulldelimiterspace} \theta } $$\end{document} where θ = 2.303 RT /cal mol −1 . Arrhenius parameters for chlorine abstraction from CCl 4 by CF 3 , C 2 F 5 , n ‐C 3 F 7 , and some hydrogenated radicals are compared.