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

The rate constants, k(1), of the reaction of CF3OC(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-H2O-He mixture at an initial pressure of 200 Torr. Ozone was continuously introduced into the reaction chamber during UV irradiation. With CF3OCH3 as a reference compound, k(1) at 298 K was (1.65 +/- 0.13) x 10(-14) cm(3) molecule(-1) s(-1). The temperature dependence of k(1) was determined as (2.33 +/- 0.42) x 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 CF3OC(O)H with respect to reaction with OH radicals was calculated to be 3.6 years. (C) 2004 Wiley Periodicals, Inc.