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
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.