Crossed-beam investigation of O(3P) + C2H5 → C2H4 + OH

Yong Pal Park, Kyoo Weon Kang, Se Hee Jung, Jong-Ho Choi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The reaction dynamics of ground-state atomic oxygen [O(3P)] with an ethyl radical (C2H5) in the gas phase was investigated using high-resolution laser spectroscopy in a crossed-beam configuration. An exothermic channel of O(3P) + C2H5 → C2H4 + OH was identified, and the nascent distributions of OH (X 2π: ν″? 0, 1) showed significant internal excitations with an unusual bimodal feature of low and high rotational N″-components with neither spin-orbit nor λ-doublet propensities. On the basis of the ab initio and statistical calculations, the reaction mechanism can be rationalized by two competing mechanisms: abstraction vs addition. The low N″-components with significant vibrational excitation can be described in terms of the direct abstraction process as a major channel. The extraordinarily hot rotational distribution of high N″-components implies that a portion of the fraction proceeds through the indirect short-lived addition-complex forming process. From the comparative analysis of the reactions of O(3P) + several hydrocarbon molecules and radicals, the reactivity and mechanistic characteristics of the title reaction are discussed.

Original languageEnglish
Pages (from-to)4891-4895
Number of pages5
JournalJournal of Physical Chemistry A
Volume114
Issue number14
DOIs
Publication statusPublished - 2010 Apr 15

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Laser spectroscopy
Orbit
Hydrocarbons
Ground state
Spectrum Analysis
Orbits
Lasers
Gases
Oxygen
Molecules
laser spectroscopy
excitation
reactivity
hydrocarbons
vapor phases
orbits
ground state
high resolution
oxygen
configurations

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Crossed-beam investigation of O(3P) + C2H5 → C2H4 + OH. / Park, Yong Pal; Kang, Kyoo Weon; Jung, Se Hee; Choi, Jong-Ho.

In: Journal of Physical Chemistry A, Vol. 114, No. 14, 15.04.2010, p. 4891-4895.

Research output: Contribution to journalArticle

Park, Yong Pal ; Kang, Kyoo Weon ; Jung, Se Hee ; Choi, Jong-Ho. / Crossed-beam investigation of O(3P) + C2H5 → C2H4 + OH. In: Journal of Physical Chemistry A. 2010 ; Vol. 114, No. 14. pp. 4891-4895.
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