Abstract
The reaction of O( 3P) atoms with methylacetlyene was studied at three temperatures between 260 and 350 K by means of a CO laser resonant absorption method. The CO formed in the reaction had a Boltzmann vibrational temperature of about 2400 K and carried only 1.9 ± 0.2% of the total available reaction energy, independent of the initial temperature of the system. Good agreement was obtained between the observed CO population distribution and that predicted by a simple statistical model, with the assumption that CH 2CH, and not C 3H 4, was formed initially in the reaction. The kinetics of the CO formation along with the results from the statistical indicate that the dominant primary step of the reaction is: O( 3P) + CH 3C 2H → CH 3CH + CO.
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