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Kinetics of the gas‐phase reaction of CF 3 OC(O)H with OH radicals at 242–328 K
Author(s) -
Chen L.,
Kutsuna S.,
Tokuhashi K.,
Sekiya A.
Publication year - 2004
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.20004
Subject(s) - chemistry , radical , photodissociation , torr , ozone , kinetics , reaction rate constant , gas phase , fourier transform infrared spectroscopy , molecule , analytical chemistry (journal) , infrared , chemical kinetics , photochemistry , organic chemistry , thermodynamics , physics , quantum mechanics , optics
The rate constants, k 1 , of the reaction of CF 3 OC(O)H with OH radicals were measured by using a Fourier transform infrared spectroscopic technique in an 11.5‐dm 3 reaction chamber at 242–328 K. OH radicals were produced by UV photolysis of an O 3 –H 2 O–He mixture at an initial pressure of 200 Torr. Ozone was continuously introduced into the reaction chamber during UV irradiation. With CF 3 OCH 3 as a reference compound, k 1 at 298 K was (1.65 ± 0.13) × 10 −14 cm 3 molecule −1 s −1 . The temperature dependence of k 1 was determined as (2.33 ± 0.42) × 10 −12 exp[−(1480 ± 60)/ T ] cm 3 molecule −1 s −1 ; possible systematic uncertainty could add an additional 20% to the k 1 values. The atmospheric lifetime of CF 3 OC(O)H with respect to reaction with OH radicals was calculated to be 3.6 years. © 2004 Wiley Periodicals, Inc. Int J Chem Kinet 36: 337–344 2004