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

页码：5485 / 5488

页数：4

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