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EPR kinetic study of the reactions of CF 3 Br with H atoms and OH radicals
Author(s) -
Le Bras G.,
Combourieu J.
Publication year - 1978
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/kin.550101203
Subject(s) - chemistry , radical , electron paramagnetic resonance , torr , reactivity (psychology) , reaction rate constant , kinetic energy , analytical chemistry (journal) , photochemistry , kinetics , organic chemistry , nuclear magnetic resonance , medicine , physics , alternative medicine , pathology , quantum mechanics , thermodynamics
Abstract Reactions of CF 3 Br with H atoms and OH radicals have been studied at room temperature at 1–2 torr pressures in a discharge flow reactor coupled to an EPR spectrometer. The rate constant of the reaction H + CF 3 Br → CF 3 + HBr (1) was found to be k 1 = (3.27 ± 0.34) × 10 −14 cm 3 /molec·sec. For the reaction of OH with CF 3 Br (8) an upper limit of 1 × 10 −15 cm 3 /molec·sec was determined for k 8 . When H atoms were in excess compared to NO 2 , used to produce OH radicals, a noticeable reactivity of OH was observed as a result of the reaction OH + HBr → H 2 O + Br, HBr being produced from reaction (1).