The role of the Criegee intermediate in the matrix thermoluminescence study of the CH2+O2 reaction

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Abstract
The identification by Lee and Pimentel [J. Chem. Phys., 74, 4851 (1981)] of two new progressions of formic acid arising from the reaction of CH2 with O2 in an argon matrix provides the first direct identification of excited formic acid as an intermediate product of this reaction. Their observations provide further evidence that the reaction of CH2 with O2 probably proceeds to products through the initial formation of the dioxmethylene adduct H2ĊOȮ (a Criegee intermediate) which then rearranges to the excited formic acid through the CH2O2 intermediates dioxirane and methylenebis (oxy). (AIP)