✦ LIBER ✦

Atmospheric chemistry of CH3Cl: mechanistic study of the reaction of CH2ClO2 radicals with HO2

✍ Scribed by Timothy J. Wallington; Michael D. Hurley; William F. Schneider

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 765 KB
Volume: 251
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(96)00080-2

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✦ Synopsis

Fourier transform infrared spectroscopy was used to identify CH2CIOOH and HC(O)CI as products of the gas phase reaction of CH2CIO 2 radicals with HO 2 radicals. At 700 Torr and 295 _ 2 K, branching ratios of kla//kl = 0.27 _+ 0.05 and klb/k ) ffi 0.73 _+ 0.12 were obtained for the CH2CIOOH forming channel and the HC(O)C1 channel, respectively. Quoted errors are two standard deviations plus an estimate of systematic 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)C1 and CH2CIOOH was investigated; rate constants of k(Cl + HC(O)C1) = (6.9 _ 2.1) X 10-13 and k(Cl + 5 +09 13 CH2CIOOH) ffi (.9_215) X 10-cm 3 molecule-1 s-1 were determined.

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