Rate coefficients and ClO radical yields in the reaction of O(1D) with CClF2CCl2F, CCl3CF3, CClF2CClF2, and CCl2FCF3

✍ Scribed by Munkhbayar Baasandorj; Karl J. Feierabend; James B. Burkholder

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 145 KB
• Volume: 43
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.20561

✦ Synopsis

Abstract

Rate coefficients, k, and ClO radical product yields, Y, for the gas‐phase reaction of O(^1^D) with CClF~2~CCl~2~F (CFC‐113) (k~2~), CCl~3~CF~3~ (CFC‐113a) (k~3~), CClF~2~CClF~2~ (CFC‐114) (k~4~), and CCl~2~FCF~3~ (CFC‐114a) (k~5~) at 296 K are reported. Rate coefficients for the loss of O(^1^D) were measured using a competitive reaction technique, with n‐butane (n‐C~4~H~10~) as the reference reactant, employing pulsed laser photolysis production of O(^1^D) combined with laser‐induced fluorescence detection of the OH radical temporal profile. Rate coefficients were measured to be k~2~ = (2.33 ± 0.40) × 10^−10^ cm^3^ molecule^−1^ s^−1^, k~3~ = (2.61 ± 0.40) × 10^−10^ cm^3^ molecule^−1^ s^−1^, k~4~ = (1.42 ± 0.25) × 10^−10^ cm^3^ molecule^−1^ s^−1^, and k~5~ = (1.62 ± 0.30) × 10^−10^ cm^3^ molecule^−1^ s^−1^. ClO radical product yields for reactions (2)–(5) were measured using pulsed laser photolysis combined with cavity ring‐down spectroscopy to be 0.80 ± 0.10, 0.79 ± 0.10, 0.85 ± 0.12, and 0.79 ± 0.10, respectively. The quoted errors in k and Y are at the 2σ (95% confidence) level and include estimated systematic errors. © 2011 Wiley Periodicals, Inc.*This article is a U.S. Government work and, as such, is in the public domain of the United States of America

Int J Chem Kinet 43: 393–401, 2011