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Kinetics and mechanism of the gas-phase reaction of O(3P) atoms with acetone

✍ Scribed by J. H. Lee; Richard B. Timmons

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
351 KB
Volume
9
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The kinetics of the reaction of O(^3^P) atoms with acetone were investigated using fast flow methods. The reaction was studied over a temperature range of 298 to 478°K. The specific rate constant obtained was (1.9 ± 0.4) × 10^12^ exp(—5040 ± 180/1.987 T) cm^3^/mol·sec. The observation of a sizable primary H/D kinetic isotope effect in comparing rates of CH~3~COCH~3~ and CD~3~COCD~3~ led to the conclusion that the major reaction channel involves H atom abstraction, namely,

The rather low Arrhenius preexponential factor obtained in this reaction is compared and contrasted with those reported for other reactions of O(^3^P) with low molecular weight compounds.

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