The classical trajectory method is applied to calculate the total cross sectio.1 for the exchange reaction Hz(u = 1) + H = H + Hz\_ The vibrational excitation is shown to influence efficiently the tbresb~ld value. Partial reaction rate-constants calculated on the basis of the cross sections obtained
Vibrational rate enhancement in the reaction OH + H2(ν = 1) → H2O + H
✍ Scribed by R Zellner; W Steinert
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 317 KB
- Volume
- 81
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The rate constant for the reaction between OH and vibrationally excited H2, OH + H 2 (v = 1) ~ H20 + H, has been measured directly at 298 K. kol is found to be (7.5 -+ 3) X 10 -13 cma/molecule s, corresponding to a vibrational rate enhancement ofkol/koo = (1.2 -+ 0.4) X 102.
📜 SIMILAR VOLUMES
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 c
## Anestimateoftherateconstant forthevibration-to-vibrationenergy transferprocess2Hz(v = I)-H2(~ = O)+ Hz& = 2) is made by analyzing the dependence of the effective rate of relaxation on the degee of laser excitation. At 82 K it is (6.3 f 2.1) X 1O-'6 cm3 molecule-t s-~.
The product hydroxyl radical arising from the reaction 0( 1D 2)-t-H 2 ---, OH + H was detected by LIF following excitation of the off-diagonal transition OH(A2E +, v' = 1 6-X 2II, v" = 2) in the region 348-357 nm. The rotational population distribution in v" = 2 appears to be inverted and quite simi