Photodissociation of ethylene at 193 nm

Article abstract of DOI:10.1063/1.463196

The photodissociation of ethylene at 193 nm was studied by measuring the product translational energy distributions for the H + C2H3 and H2 + C2H2 channels.In agreement with previous workers, it was determined that atomic and molecular elimination occur in relatively equal amounts.Using 1,1 D2CCH2 and 1,2 cis HDCCDH, it was shown that both acetylene and vinylidene are formed and that the acetylene/vinylidene ratio is approximately 2/3 in the molecular elimination.This H2 elimination channel has a translational energy distribution peaked at around 20 kcal/mol, indicating that it is a concerted process with a substantial exit barrier.It was found that the H atom elimination channel is best described as a simple bond rupture occurring after internal conversion of the electronically excited molecule to the vibrationally excited ground state ethylene.Some of the primary C2H3 product has sufficient internal energy to spontaneously decompose to H + HC<*>CH.At higher laser intensity a large fraction of the C2H3, however, absorbs another photon and fragments to H + H2C=C: (¹A₁ and ³B₂).

Full text of DOI:10.1063/1.463196

Photodissociation of ethylene at 193 nm
B. A. Balko, J. Zhang, and Y. T. Lee
Citation: The Journal of Chemical Physics 97, 935 (1992); doi: 10.1063/1.463196
View online: http://dx.doi.org/10.1063/1.463196
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/97/2?ver=pdfcov
Published by the AIP Publishing
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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:
131.193.242.165 On: Mon, 01 Dec 2014 21:11:09

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:
131.193.242.165 On: Mon, 01 Dec 2014 21:11:09

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:
131.193.242.165 On: Mon, 01 Dec 2014 21:11:09

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:
131.193.242.165 On: Mon, 01 Dec 2014 21:11:09

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:
131.193.242.165 On: Mon, 01 Dec 2014 21:11:09

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:
131.193.242.165 On: Mon, 01 Dec 2014 21:11:09