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The rate constant for the recombination of trifluoromethyl radicals at T = 296 K

✍ Scribed by A. B. Vakhtin

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 639 KB
Volume: 28
Category: Article
ISSN: 0538-8066
DOI: 10.1002/(sici)1097-4601(1996)28:6<443::aid-kin6>3.0.co;2-v

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✦ Synopsis

The high-pressure rate constant of the CF, + CF, + C,F, reaction at T = 296 K was rneasured i n the pulse photolysis ( A = 694 3 nm ruby laser) of CF, NO in the presence of NO by means of the time-resolved detection of CF,NO by the intracavity absorption of He-Ne laser radiation ( A = 632 8 nrn) The obtained value is = ( 3 9 ? I 3) X 10 I' crn'/s 9 1996 lohn Wiley & Sons Inc

INTRODUCTlON

The kinetics of the CF, + CF, -C2F, reaction was extensively studied by various research groups [ 1-91.

The high-pressure room-temperature rate constants fall within relatively wide range from 2 X lo-'' to 4 X 10i cm3/s. This article reports the measured room-temperature rate constant of the recombination reaction of trifluoromethyl radicals. The kinetic results obtained are compared to those available in the literature, and possible reasons of some discrepancies are discussed. The measuring technique is described in detail. Now the technique is being applied to the kinetic studies of the self-combination reactions of the higher perfluorinated alkyl radicals CnFzn + I (n = 2, 3, 4). The results of these studies are to be reported in subsequent arlicles.

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