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Rate constants for the reactions of OH radicals with CH 3 OCF 2 CF 3 , CH 3 OCF 2 CF 2 CF 3 , and CH 3 OCF(CF 3 ) 2
Author(s) -
Tokuhashi K.,
Takahashi A.,
Kaise M.,
Kondo S.,
Sekiya A.,
Yamashita S.,
Ito H.
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)31:12<846::aid-kin2>3.0.co;2-4
Subject(s) - chemistry , arrhenius equation , radical , flash photolysis , reaction rate constant , photodissociation , analytical chemistry (journal) , atmospheric temperature range , laser induced fluorescence , kinetics , impurity , photochemistry , fluorescence , organic chemistry , activation energy , thermodynamics , physics , quantum mechanics
The rate constants for the reactions of OH radicals with CH 3 OCF 2 CF 3 , CH 3 OCF 2 CF 2 CF 3 , and CH 3 OCF(CF 3 ) 2 have been measured over the temperature range 250–430 K. Kinetic measurements have been carried out using the flash photolysis, laser photolysis, and discharge flow methods combined respectively with the laser induced fluorescence technique. The influence of impurities in the samples was investigated by using gas‐chromatography. The following Arrhenius expressions were determined: k (CH 3 OCF 2 CF 3 ) = (1.90 −0.61 +0.90 ) × 10 −12 exp[−(1510 ± 120)/T], k (CH 3 OCF 2 CF 2 CF 3 ) = (2.06 −0.45 +0.58 ) × 10 −12 exp[−(1540 ± 80)/T], and k (CH 3 OCF(CF 3 ) 2 ) = (1.94 −0.38 +0.48 ) × 10 −12 exp[−(1450 ± 70)/T] cm 3 molecule −1 s −1 . © 1999 John Wiley & Sons, Inc. Int J Chem Kinet 31: 846–853, 1999