Crossed beam studies of the reactions of atomic oxygen in the ground 3P and first electronically excited 1D states with hydrogen sulfide

被引:35
作者
Balucani, N [1 ]
Stranges, D [1 ]
Casavecchia, P [1 ]
Volpi, GG [1 ]
机构
[1] Univ Perugia, Dipartimento Chim, I-06123 Perugia, Italy
关键词
D O I
10.1063/1.1714809
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The reactions of both ground, P-3, and electronically excited, D-1, oxygen atoms with hydrogen sulfide, H2S, have been investigated by means of the crossed molecular beams method with mass spectrometric detection at different collision energies. Amongst the possible reaction channels those leading to HSO+H for the O(P-3) reaction and to HSO/HOS+H and SO+H-2 for the O(D-1) reaction have been identified and investigated. The dynamics of the channels leading to HSO/HOS+H are elucidated for the reactions of both states and the trend with increasing the collision energy analyzed. Noteworthily, the formation of SO+H-2 products appears to be an open channel for the O(D-1) reaction, at least for the highest collision energy investigated (11.8 kcal/mol). Finally, the recent experimental and theoretical estimates of the enthalpy of formation of the HSO radical have been critically analyzed to evaluate their conformity with the present experimental data. (C) 2004 American Institute of Physics.
引用
收藏
页码:9571 / 9582
页数:12
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