Kinetics of the reaction C2H5 + HO2 by time-resolved mass spectrometry

The Journal of Physical Chemistry. a
Wiebke LudwigFriedrich Temps

Abstract

The overall rate constant for the radical-radical reaction C2H5 + HO2 --> products has been determined at room temperature by means of time-resolved mass spectrometry using a laser photolysis/flow reactor combination. Excimer laser photolysis of gas mixtures containing ethane, hydrogen peroxide, and oxalyl chloride was employed to generate controlled concentrations of C2H5 and HO2 radicals by the fast H abstraction reactions of the primary radicals Cl and OH with C2H6 and H2O2, respectively. By careful adjustments of the radical precursor concentrations, the title reaction could be measured under almost pseudo-first-order conditions with the concentration of HO2 in large excess over that of C2H5. From detailed numerical simulations of the measured concentration-time profiles of C2H5 and HO2, the overall rate constant for the reaction was found to be k1(293 K) = (3.1 +/- 1.0) x 10(13) cm3 mol(-1) s(-1). C2H5O could be confirmed as a direct reaction product.

References

Jul 15, 2006·The Journal of Physical Chemistry. a·Hans-Heinrich CarstensenAnthony M Dean

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Citations

Feb 27, 2008·The Journal of Chemical Physics·Jeremiah J WilkeHenry F Schaefer
Jan 18, 2018·Physical Chemistry Chemical Physics : PCCP·D SchleierK Voronova
Aug 10, 2007·Physical Chemistry Chemical Physics : PCCP·Adam M KneppStephen J Klippenstein
Jan 3, 2007·Journal of Mass Spectrometry : JMS
Aug 4, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Nan-Nan WuLiang Li
Apr 16, 2018·The Journal of Chemical Physics·Hiroshi KohguchiOskar Asvany
Jan 7, 2021·Physical Chemistry Chemical Physics : PCCP·Domenik SchleierIngo Fischer
Oct 6, 2009·The Journal of Physical Chemistry. a·Zekai HongRonald K Hanson
Mar 21, 2013·The Journal of Physical Chemistry Letters·Brian BrumfieldGerard Wysocki
Jul 25, 2012·The Journal of Physical Chemistry. a·Alexander S Sharipov, Alexander M Starik

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