Observation of a stripping threshold for the reaction N/sub 2//sup +/+CH/sub 4/. -->. N/sub 2/H/sup +/+CH/sub 3/

Journal Article · Sat May 01 04:00:00 EDT 1976 · J. Chem. Phys.; (United States)

OSTI ID:7355313

Wyatt, J R; Strattan, L W; Snyder, S C; Hierl, P M

Chemical accelerator studies on isotopic variants of the reaction N/sub 2//sup +/+CH/sub 4/..-->..N/sub 2/H/sup +/+CH/sub 3/ are reported. Reaction cross sections, as well as velocity and angular distributions of the ionic products have been measured as a function of initial translational energy over the energy range 0.65--35 eV (center of mass). The results are similar to those recently reported for the reaction of Ar/sup +/ with CH/sub 4/. The excitation function maximizes at about 5 eV (c.m.) and decreases at lower collision energies, appearing to possess a threshold at 0.1 eV. At the higher energies there is a large isotope effect favoring abstraction of H over D. The product velocity vector distribution is strongly peaked forward of the center of mass, indicating that the reaction is predominantly direct over the energy range studied. The spectator stripping model, although providing a reasonable first approximation to the reaction dynamics, overestimates the product translational energy by approximately 0.1 eV. This behavior is presumed to be caused by a basin in the potential energy hypersurface for this reaction. If, however, an N/sub 2/CH/sub 4//sup +/ complex is formed at low collision energies, it appears to decompose via reaction channels other than that resulting in N/sub 2/H/sup +/ formation. (AIP)

• Research Organization: Department of Chemistry, University of Kansas, Lawrence, Kansas 66045
• OSTI ID: 7355313
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 64:9; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
ALKANES
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CROSS SECTIONS
CRYOGENIC FLUIDS
DEUTERIUM
EXCITATION FUNCTIONS
FLUIDS
HYDROCARBONS
HYDROGEN ISOTOPES
IONS
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LIGHT NUCLEI
METHANE
NITROGEN IONS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
REACTION KINETICS
STABLE ISOTOPES