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Reaction of CF3 radicals with H2S

✍ Scribed by Haluk Arican; Neville L. Arthur

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 490 KB
Volume: 16
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550160404

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✦ Synopsis

Hydrogen abstration from H,S by CF, radicals, generated by the photolysis of both CF,COCF, and CF,I. has been studied in the temperature range 314-434 K. The rate constant, based on the value of lo', 36 cm3/mol . s for the recombination of CF, radicals, is given by log h, = (12.20 I 0.05) -(19,220 2 360)/19.145T with CF,COCF, as the radical source, and log h, = (12.00 IT 0.07) -(18,270 t 470)/19.145T

with CFJ as the radical source, where k, is in cm3/mol . s and E is in J/mol. These results resolve a previously existing controversy concerning the values of the rate constants for this reaction. They show that CF, radicals are less reactive than CH, radicals in attacking H,S, and this behavior indicates that polar effects play a significant role in the hydrogen transfer reactions of CF, radicals.

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