High-Pressure Falloff Curves and Specific Rate Constants for the Reaction CH3 + O2 CH3O2 CH3O + O

Article abstract of DOI:10.1021/j100266a036

The recombination reaction CH3 + O2 -> CH3O2 was studied at room temperature by laser flash photolysis over the pressure range 0.25-150 bar in the bath gases Ar and N2.Falloff curves are onstructed, leading to a limiting high-pressure rate constant of k_rec,infinite = (2.2 +/- 0.3) E-12 cm³ molecule^-1s^-1.By use of a simplified adiabatic channel model, on the basis of the measured k_rec,infinite a set of specific rate constants k(E,J) is calculated for the unimolecular dissociation CH3O2 -> CH3 + O2 and compared with the reaction CH3O2 -> CH3O + O.With the derived specific rate constants, thermal rate constants for the reaction CH3 + O2 ->/<- CH 3O + O are calculated and compared with experiments.