Reaction of i-Heptafluoropropyl Radicals with Cyanogen Chloride
The gas-phase reaction of i-C3F7 radicals with cyanogen chloride has been studied between 70 and 330 deg C, using heptafluoro-2-iodopropane as the free-radical source.The main product, 2-chloroheptafluoropropane, is formed via chlorine-atom abstraction by i-C3F7: i-C3F7 + ClCN -> C3F7Cl + CN (6) for which log106/k1/2/c)/cm3/2mol-1/2s-1/2> = 6.27-14.41/2.303 RT was obtained.At lower temperatures the Arrhenius plot shows curvature.This was interpreted as the occurence of another reaction producing C3F7Cl, wich could be i-C3F7 + ClCN C3F7ClCN (9.-9) C3F7ClCN -> C3F7Cl + CN (10).The results are compared with those for the reaction of other perfluoroalkyl radicals with ClCN.
Voehringer, Cecilia M. de,Staricco, Eduardo H.
p. 2631 - 2638
(2007/10/02)
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