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Substituent effects on the disproportionation‐combination rate constant ratios for gas‐phase halocarbon radicals. IV. Reactions of ·CF 3 + CF 3 CH 2 CF 2 · and CF 3 CH 2 CF 2 · + CF 3 CH 2 CF 2 ·
Author(s) -
Smith Shane R.,
Holmes Bert E.
Publication year - 1999
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/(sici)1097-4601(1999)31:3<237::aid-kin6>3.0.co;2-e
Subject(s) - chemistry , halocarbon , radical , disproportionation , substituent , reaction rate constant , gas phase , phase (matter) , photochemistry , computational chemistry , organic chemistry , kinetics , catalysis , physics , quantum mechanics
Rate constant ratios, k d / k c , for the disproportionation/combination reaction at a temperature of 295 ± 2 K, have been measured as 0.034 ± 0.009 for the collision between CF 3 CH 2 CF 2 + CF 3 radicals and as 0.075 ± 0.019 for CF 3 CH 2 CF 2 + CF 3 CH 2 CF 2 radicals. The effect of the two fluorine substituents on the rate constant ratio is compared to previous k d / k c s with CF 3 CH 2 CH 2 , CF 3 CH 2 CHCl, and CF 3 CH 2 CHCF 3 radicals. © 1999 John Wiley & Sons, Inc. Int J Chem Kinet: 31: 237–243, 1999