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| Titel: |
Reactive scattering of a supersonic oxygen atom beam : O H2S |
| Auteur: |
Davidson, F. E. Clemo, A. R. Duncan, G. L. Browett, R. J. Hobson, J. H. Grice, R. |
| Verschenen in: |
Molecular physics |
| Paginering: | Jaargang 46 (1982) nr. 1 pagina's 33-40 |
| Jaar: |
1982-05 |
| Inhoud: |
Reactive scattering of O atoms with H2S molecules has been studied at an initial translational energy E≅30 kJ mol-1 using a supersonic beam of O atoms seeded in He. Reactive scattering of HSO radicals is nearly isotropic but slightly favours the backward hemisphere with a product translational energy E'av∼26 kJ mol-1. The total reaction cross section was measured as a function of initial translational energy by using a He/Ne buffer gas mixture to vary the O atom velocity. The threshold energy E0 = 14 ± 2 kJ mol-1 for the formation of HSO product is in good agreement with the activation energy for the overall reaction of O atoms with H2S molecules. Hence the formation of HSO product represents an important primary pathway for the O + H2S reaction which is initiated by bonding of the electrophilic O atom to the lone pair electrons of the S atom. The potential energy surface for H atom displacement has a barrier in the exit valley which promotes nearly isotropic scattering and high product translational energy. The heat of formation of the HSO radical is estimated as ΔHf(HSO) = -6 ± 8 kJ mol-1. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 13 van 20 gevonden artikelen
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