Kinetics of the reaction of the CH2Cl radical with oxygen atoms

Article abstract of DOI:10.1016/S0009-2614(97)00895-6

The kinetics of the reaction of CH₂Cl with O(³P) has been investigated in a heatable tubular reactor coupled to a photoionization mass spectrometer. The decay of CH₂Cl was monitored as a function of O atom concentration ([O]₀/[CH₂Cl]₀ > 30) to determine the rate constant of the reaction as a function of temperature and pressure. The rate constant measured is independent of density and was fitted to an Arrhenius expression: k = (1.49 ± 0.35) × 10^-10 exp[(1.46 ± 0.38) kJ mol^-1/RT] cm³ molecule^-1 s^-1 over the temperature range 297-823 K. Both CHClO and CH₂O were detected as products of the CH₂Cl + O(³P) reaction. The production of CHClO is the major reaction channel.