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Vibrational enhancement of the reaction rate and steric requirements in the H + D2(ν) and D + H2(χ) reactions

✍ Scribed by I. Schechter; R. Kosloff; R.D. Levine


Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
496 KB
Volume
121
Category
Article
ISSN
0009-2614

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✦ Synopsis


The cone or acceptance for H+H= reactive collisions is shown Lo open up upon strelching of the H, bond. AL a given wtmslational energy, the sreric faclor is thus much larger for vibrzkonally cxcircd rcngems as demonswatcd by class&l IrajccLoq compulorions for H+ D?(U) and D+Hz(o). AI a given lolaI cncrgy. Ihc efficacy of rcagcm vibralional cxcimlion is convenicndy represenkd by J surprisal plot. The surprisal panmeler is essemially isompically invarinnr.


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Rate coefficients, in units of 10-~0 cm 3 molecule-~ s-~, for the O(~D) reactions with H2, D 2 and HD at 298 K were determined to be 1.2 \_\_\_ 0.1, 1.1 + 0.1, and 1.2 + 0.1, respectively. The H atom yield in the O(~ D) + HD reaction, relative to that in the O(ID) + H 2 reaction, was measured to be