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## Abstract The reaction of hydrogen atoms with diazomethane was used as a source of methyl radicals to study the reaction of oxygen atoms with methyl radicals. This investigation verifies directly the earlier results that formaldehyde is a major product and that the rate constant is greater than 3
The exponential relaxation of CHI, produced by the reaction 0 + CzHa --+ CH3 + HCO, to its steady-state concentration was quantitatively monitored after the reactants were mixed. The relaxation profiles yield the rate constant of the reaction 0 + CH3 -+ HzCO + H equal to (1.85 f 0.28) X cm3/molecule
The reaction of CH3 with OH has been studied near 1200 K and 1 atmosphere pressure in shock tube experiments in which UV absorption was used to monitor [OH]. A rate coefficient of (1.1 ? 0.3) x 1013 cm3/mol-s was measured for removal of OH by CH3. This measured value is compared with previous experi