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Gas phase reaction of heptafluoroisopropyl radicals with carbon tetrachloride
Author(s) -
de Vöhringer Cecilia M.,
Staricco Eduardo H.
Publication year - 1986
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.550180105
Subject(s) - chemistry , radical , arrhenius equation , carbon tetrachloride , gas phase , photodissociation , iodide , chlorine , reaction rate constant , photochemistry , bromine , phase (matter) , atmospheric temperature range , analytical chemistry (journal) , activation energy , kinetics , inorganic chemistry , organic chemistry , thermodynamics , physics , quantum mechanics
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.