標題: Photodissociation of nitrosobenzene and decomposition of phenyl radical
作者: Tseng, CM
Choi, YM
Huang, CL
Ni, CK
Lee, YT
Lin, MC
應用化學系分子科學碩博班
Institute of Molecular science
公開日期: 30-九月-2004
摘要: Photodissociation of nitrosobenzene in a molecular beam has been studied by multimass ion imaging techniques. Photodissociation at 248 nm shows that there is only one dissociation channel, i.e., C6H5NO --> C6H5 + NO, regardless of the fact that the other channel, C6H5NO --> C6H4 + HNO, is energetically accessible in agreement with theoretically predicted results. Photodissociation at 193 nm also shows the same dissociation channel. However, about 10% of the C6H5 radicals produced at this wavelength further decomposed into benzyne and H atom, and the dissociation rates of phenyl radical as a function of internal energies were measured. The averaged photofragment translational energies released from the dissociation of nitrosobenzene at 193 and 248 nm are 10.2 and 6.9 kcal/mol, respectively, and fragment distributions are almost isotropic at both wavelengths. In addition, the thermal rate constant for dissociation of C6H5NO has been computed and compared with experimental data; the agreement between theory and experiment is excellent, confirming the most recently reported unusually high A-factor (> 10(17) s(-1)).
URI: http://dx.doi.org/10.1021/jp049425o
http://hdl.handle.net/11536/26366
ISSN: 1089-5639
DOI: 10.1021/jp049425o
期刊: JOURNAL OF PHYSICAL CHEMISTRY A
Volume: 108
Issue: 39
起始頁: 7928
結束頁: 7935
顯示於類別:期刊論文


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