Structures in the energy dependence of the rate constant for ketene isomerization

Journal Article · Sat May 15 00:00:00 EDT 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.464592· OSTI ID:6889547

Lovejoy, E R; Moore, C B ^[1]

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1. Department of Chemistry, University of California at Berkeley (United States) Materials and Chemical Sciences Division of the Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)

The isomerization of highly vibrationally excited and rotationally cold ketene has been investigated by monitoring the [sup 12]CO and [sup 13]CO dissociation products following laser excitation of jet-cooled [sup 12]CH[sub 2] [sup 13]CO, [sup 13]CH[sub 2] [sup 12]CO, and [sup 12]CD[sub 2] [sup 13]CO. The rate constants for the reactions [sup 12]CH[sub 2] [sup 13]CO[r reversible][sup 13]CH[sub 2] [sup 12]CO and [sup 12]CD[sub 2] [sup 13]CO[r reversible][sup 13]CD[sub 2] [sup 12]CO are reported as a function of energy with a resolution of 1 cm[sup [minus]1]. The rate constants exhibit pronounced peaks as a function of energy near the reaction threshold. This structure is attributed to quasistable motion along the reaction coordinate in the vicinity of the isomerization transition state.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6889547
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 98:10; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CARBON 12
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COOLING
DECOMPOSITION
DISSOCIATION
ENERGY
ENERGY DEPENDENCE
ENERGY LEVELS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITED STATES
ISOMERIZATION
ISOTOPES
JETS
KETENES
LASERS
LIGHT NUCLEI
MONITORING
NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RESOLUTION
ROTATIONAL STATES
STABLE ISOTOPES
THRESHOLD ENERGY
VIBRATIONAL STATES
YIELDS