Microwave kinetic spectroscopy of reaction intermediates: O + ethylene reaction at low pressure

Article abstract of DOI:10.1063/1.451765

A microwave spectroscopic method has been developed to study elementary reactions in real time through in situ observation of rotational spectra of reaction intermediates such as free radicals with lifetime as short as 1 ms.This method was applied to the O(³P) + ethylene reaction in order to assess the roles of (a) vinoxy + H and (b) CH3 + CHO channels in the initial process.The reaction was initiated by irradiating an N2O/C2H4 mixture containing a trace amount of mercury with the 253.7 nm mercury resonance line, and the time evolution of vinoxy, HCO, and H2CO was followed by measuring their microwave absorption intensities as functions of time.The branching ratio was thus determined to be 0.4 +/- 0.1 and 0.5 +/- 0.1 for (a) and (b), respectively, at the sample pressure of 30 mTorr.The present result agrees with those obtained by Hunziker et al. using much higher pressures of samples, but is not compatible with the observation of Buss et al. that (a) is dominant in collision-free conditions.

Full text of DOI:10.1063/1.451765

Microwave kinetic spectroscopy of reaction intermediates: O+ethylene reaction at
low pressure
Yasuki Endo, Soji Tsuchiya, Chikashi Yamada, Eizi Hirota, and Seiichiro Koda
Citation: The Journal of Chemical Physics 85, 4446 (1986); doi: 10.1063/1.451765
View online: http://dx.doi.org/10.1063/1.451765
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/85/8?ver=pdfcov
Published by the AIP Publishing
Articles you may be interested in
Modeling the kinetics of neutral particles in low-pressure chemically active planar microwave plasmas
J. Appl. Phys. 84, 4137 (1998); 10.1063/1.368628
Kinetic and thermodynamic properties of the F+O2 reaction system under high pressure and low
temperature conditions
J. Chem. Phys. 102, 5317 (1995); 10.1063/1.469258
An electron diffraction investigation of the reaction intermediate in the gasphase bromination of ethylene
J. Chem. Phys. 60, 3264 (1974); 10.1063/1.1681516
Hydroxyl Radical Kinetics by Kinetic Spectroscopy. VII. The Reaction with Ethylene in the Range
300–500°K
J. Chem. Phys. 53, 1284 (1970); 10.1063/1.1674133
Molecular Kinetics of Hydrogenation and Exchange Reactions of Ethylene at Surfaces
J. Chem. Phys. 21, 949 (1953); 10.1063/1.1699083
This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.209.6.50 On: Sat, 20 Dec 2014 14:05:19

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.209.6.50 On: Sat, 20 Dec 2014 14:05:19

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.209.6.50 On: Sat, 20 Dec 2014 14:05:19

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.209.6.50 On: Sat, 20 Dec 2014 14:05:19

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.209.6.50 On: Sat, 20 Dec 2014 14:05:19

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.209.6.50 On: Sat, 20 Dec 2014 14:05:19

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.209.6.50 On: Sat, 20 Dec 2014 14:05:19

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.209.6.50 On: Sat, 20 Dec 2014 14:05:19