Methylperoxy Self-Reaction: Products and Branching Ratio between 223 and 333 K

Article abstract of DOI:10.1021/j100384a040

Products from Cl atom initiated oxidation of CH4 were analyzed by matrix isolation Fourier transform infrared spectroscopy (MI-FTIR) in order to determine the branching ratio k_1a/k₁ of the methylperoxy self-reaction: CH3O2 + CH3O2 -> CH3O + CH3O + O2 (1a); CH3O2 + CH3O2 -> HCHO + CH3OH + O2 (1b); and CH3O2 + CH3O2 -> CH3OOCH3 + O2 (1c).The value k_1a/k₁ = k_1a/(k_1a+k_1b+k_1c) showed a pronounced temperature dependence in the range 223 - 333 K and is given by the relationship k_1a/k₁ = 1/ <1 + /(19 +/- 5)>.These results are combined with previous measurements to make a recommendation for the temperature range 223 - 573 K: k_1a/k₁ = 1/<1 + /(33 +/- 10)>.