Microcanonical rates for the unimolecular dissociation of the ethyl radical

被引:51
|
作者
Gilbert, T [1 ]
Grebner, TL [1 ]
Fischer, I [1 ]
Chen, P [1 ]
机构
[1] Swiss Fed Inst Technol, Organ Chem Lab, CH-8092 Zurich, Switzerland
来源
JOURNAL OF CHEMICAL PHYSICS | 1999年 / 110卷 / 12期
关键词
D O I
10.1063/1.478445
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
We report results on the photodissociation dynamics of the ethyl radical, C2H5. A beam of internally cold radicals is generated by supersonic jet flash pyrolysis of ethyl iodide or n-propylnitrite, respectively. Upon excitation into the A (2)A(1) 3s Rydberg state ethyl dissociates, presumably on the ground-state surface, into ethylene and a hydrogen atom that is detected by time-resolved photoionization. By varying the excitation energy between 264 and 245 nm, microcanonical rates are obtained as a function of excitation energy. The reaction rates are on the order of 10(7) s(-1), several orders of magnitude slower than expected from simple Rice-Ramsperger-Kassel-Marcus calculations. (C) 1999 American Institute of Physics. [S0021-9606(99)02812-3].
引用
收藏
页码:5485 / 5488
页数:4
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