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Atmospheric chemistry of HFC‐134a: Kinetics of the decomposition of the alkoxy radical CF 3 CFHO
Author(s) -
Møgelberg Trine E.,
Sehested Jens,
Wallington Timothy J.,
Nielsen Ole J.
Publication year - 1997
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(1997)29:3<209::aid-kin8>3.0.co;2-y
Subject(s) - chemistry , diluent , radical , radiolysis , decomposition , reaction rate constant , alkoxy group , kinetics , bond cleavage , atmosphere (unit) , photochemistry , atmospheric chemistry , organic chemistry , ozone , thermodynamics , alkyl , catalysis , physics , quantum mechanics
Decomposition of the CF 3 CFHO radical formed in the reaction of CF 3 CFHO 2 radicals with NO was studied at 296 and 393 K using a pulse radiolysis transient VIS‐UV absorption absolute rate technique. At room temperature in 1 atmosphere of SF 6 diluent it was found that the majority (79 ± 20)% of CF 3 CFHO radicals formed in the CF 3 CFHO 2 + NO reaction decompose within 3 μs via C(SINGLE BOND)C bond scission. This result is discussed with respect to the current understanding of the atmospheric degradation of HFC‐134a. As a part of the present work the rate constant ratio k CF3CFH+02 / k CF3CFH+NO was determined to be 0.144 ± 0.029 in one atmosphere of SF 6 diluent at 296 K. © 1997 John Wiley & Sons, Inc. Int J Chem Kinet 29: 209–217, 1997.