Abstract
The HF product energy distribution in the reaction of F atoms with ·C 2H 3 radicals has been directly measured using a modification of the arrested relaxation infrared chemiluminescence technique in which the vinyl radicals are prepared and react to form the observed products in successive chemical reactions. The experimentally observed vibrational and rotational distributions are correctly reproduced by a calculation in which the reaction exoergicity is partitioned statistically among the products of the unimolecular decomposition of energized vinyl fluoride. Some properties of the transition state for this process are thereby elucidated. The statistical energy partitioning likely results from the relatively high (125 kcal mol −1) excitation of the vinyl fluoride intermediate.
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