Kinetics of the Reaction of Vinyl Radical With Molecular Oxygen

The kinetics of the reaction C[sub 2]H[sub 3] + O[sub 2][sup [minus]] products (reaction 1) has been studied at temperatures 299-1005 K and He densities (3-18) x 10[sup 16] molecule cm[sup [minus]3] using laser photolysis/photoionization mass spectrometry. Rate constants were determined in time-reso...

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Bibliographic Details
Published in:Journal of physical chemistry (1952) 1995-02, Vol.99 (8), p.2247-2249
Main Authors: Knyazev, Vadim D, Slagle, Irene R
Format: Article
Language:English
Subjects:
400102 - Chemical & Spectral Procedures
400201 - Chemical & Physicochemical Properties
400500 - Photochemistry
400800 - Combustion, Pyrolysis, & High-Temperature Chemistry
ALKYL RADICALS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION KINETICS
DECOMPOSITION
ELEMENTS
HYDROCARBONS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
IONIZATION
KINETICS
MASS SPECTROSCOPY
MOLECULES
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN
PHOTOCHEMICAL REACTIONS
PHOTOIONIZATION
PHOTOLYSIS
RADICALS
REACTION KINETICS
SPECTROSCOPY
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
VINYL RADICALS
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Description
Summary:The kinetics of the reaction C[sub 2]H[sub 3] + O[sub 2][sup [minus]] products (reaction 1) has been studied at temperatures 299-1005 K and He densities (3-18) x 10[sup 16] molecule cm[sup [minus]3] using laser photolysis/photoionization mass spectrometry. Rate constants were determined in time-resolved experiments as a function of temperature and bath gas density. The overall rate constant of reaction 1 is independent of pressure within the experimental range and can be described by the Arrhenius expression k[sub 1] = (6.92 [+-] 0.17) x 10[sup [minus]12] exp((120 [+-] 12 K)/T) cm[sup 3] molecule [sup 1]s[sup [minus]1]. Experimental results are compared with theoretical predictions and implications for the mechanism of reaction 1 are discussed. 16 refs., 2 figs., 1 tab.
ISSN:0022-3654
1541-5740
DOI:10.1021/j100008a002