The reaction of Cl atoms with CH_2ClI was studied in the gas phase with the very low pressure reactor (VLPR) technique over the temperature range 273-363 K. The absolute rate constant was found to be k_1 = 3.13 +- 0.27 * 10~(-11) cm~3 molecule~(-1)s~(-1) (2#sigma# uncertainty), independent of temperature. The reaction occurs through iodine atom abstraction leading to CH_2Cl and ICl products. The secondary reaction of Cl atoms with ICl as well as the self-reaction of CH_2Cl radicals was also occurring, leading to the production of I atoms, Cl_2 CH_2=CHCl, and HCl, respectively. Ab initio calculations at the MP2/3-21++G(2d,2p) level of theory suggest that the title reaction may proceed via the intermediate formation of a weakly bound adduct CH_2ClI-Cl, with an I-Cl bond strength of 54.8 kJ mol~(-1). The enthalpies of formation for CH_2ClI and CHClI at 298.15 K were also calculated at the MP2/3-21++G(2d,2p) level of theory to be 13.0 and 212.0 kJ mol~(-1), respectively.
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