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Upper limits for the rate constants of the reactions CF3O+O3→CF3O2+O2 and CF3O2+O3→CF3O+2O2

✍ Scribed by M. Matti Maricq; Joseph J. Szente

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
673 KB
Volume
213
Category
Article
ISSN
0009-2614

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✦ Synopsis

Flash photolysis/time-resolved UV absorption measurements of the rate constants for the title reactions are reported over the temperature range 2 lo-253 K. The photolysis of F2/CF,H/03/02/N, gas mixtures reveals that the formation of CF302 and CF,O radicals has no measurable effect on the ozone concentration. Fitting the data to a kinetic model yields upper limits of k, < 5 x 1 O-I4 cm3 s-l and k,< 1 x lo-" cm3 s-' for the CF,O+O, and CF,02+01 reactions, respectively, over the temperature range 210-353 K. We have also measured the rate constant for the CF301 self-reaction to be k*= (3.8 + 1) x lo-", (3.2 k 0.4) x lo-12, and (2.5 +0.3)x lost2 cm3 s-' at T=210,295, and 353 K, respectively, and the CF,H+F rate constant to be 4x lo-l4 cm3 s-' and 2.6~lO-'~cm's-'at 210and353K.

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