The isotope exchange reaction of fast hydrogen atoms with deuterated alkynes and alkenes

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.458464· OSTI ID:7246012

Johnston, G W; Satyapal, S; Bersohn, R ^[1]; Katz, B ^[2]

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1. Department of Chemistry, Columbia University, New York, New York 10027 (USA)
2. Department of Chemistry, Ben Gurion University, Beersheba, (Israel)

The exchange reaction H(1 eV)+RD{r arrow}RH+D, where RD was deuterated acetylene, methylacetylene, ethylene, and propylene was studied by laser induced fluorescence detection of the hydrogen and deuterium atoms. The reaction cross sections were 1.69{plus minus}0.22, 0.50{plus minus}0.15, 1.85{plus minus}0.20, and 1.10{plus minus}0.14 A{sup 2}, respectively. The fraction of the incident relative kinetic energy released as translation was 0.42, 0.34, 0.40, and 0.34. That the addition of a methyl group only slightly reduces the energy released as translation is regarded as proof that the reaction at this energy does not involve a long lived intermediate complex, but is a direct localized displacement. Further confirmation comes from the observation that the velocity of the D atom product of H+C{sub 2}D{sub 2} is correlated with the velocity of the H atom reactant.

• OSTI ID: 7246012
• Journal Information: Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 92:1; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKENES
ALKYNES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DEUTERIUM COMPOUNDS
ELEMENTS
ENERGY
FLUORESCENCE
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
KINETIC ENERGY
KINETICS
LUMINESCENCE
NONMETALS
ORGANIC COMPOUNDS
REACTION INTERMEDIATES
REACTION KINETICS