ATMOSPHERIC CHEMISTRY OF CH3CL - MECHANISTIC STUDY OF THE REACTION OFCH2CLO2 RADICALS WITH HO2

Citation
Tj. Wallington et al., ATMOSPHERIC CHEMISTRY OF CH3CL - MECHANISTIC STUDY OF THE REACTION OFCH2CLO2 RADICALS WITH HO2, Chemical physics letters, 251(3-4), 1996, pp. 164-173
Citations number
20
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
ISSN journal
00092614
Volume
251
Issue
3-4
Year of publication
1996
Pages
164 - 173
Database
ISI
SICI code
0009-2614(1996)251:3-4<164:ACOC-M>2.0.ZU;2-N
Abstract
Fourier transform infrared spectroscopy was used to identify CH2ClOOH and HC(O)Cl as products of the gas phase reaction of CH2ClO2 radicals with HO2 radicals. At 700 Torr and 295 +/- 2 K, branching ratios of k( 1a)/k(1) = 0.27 +/- 0.05 and k(1b)/k(1) = 0.73 +/- 0.12 were obtained for the CH2ClOOH forming channel and the HC(O)Cl channel, respectively . Quoted errors are two standard deviations plus an estimate of system atic uncertainties. This result is discussed with respect to previous literature data and computer models of atmospheric chemistry. As part of this work, the reactivity of Cl atoms towards HC(O)Cl and CH2ClOOH was investigated; rate constants of k(Cl + HC(O)Cl) = (6.9 +/- 2.1) X 10(-13) and k(Cl + CH2ClOOH) = (5.9(-2.5)(+0.9)) X 10(-13) cm(3) molec ule(-1) s(-1) were determined.