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Kinetics of the gas-phase reaction of CF3OC(O)H with OH radicals at 242–328 K

✍ Scribed by L. Chen; S. Kutsuna; K. Tokuhashi; A. Sekiya

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
123 KB
Volume
36
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

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

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