Effect of collision energy and vibrational excitation on the reaction of C/sub 2/H/sup +//sub 2/+H/sub 2/

Journal Article · Sat Dec 15 00:00:00 EST 1984 · J. Chem. Phys.; (United States)

OSTI ID:6162849

Turner, T; Lee, Y T

The relative efficiencies between the excitation of C--C stretching vibration and collision energy on the promotion of the H atom transfer reaction of C/sub 2/H/sup +//sub 2/ +H/sub 2/..-->..C/sub 2/H/sup +//sub 3/ +H have been examined. At low collision energies the reaction is strongly vibrationally enhanced in agreement with previous thermal energy studies. Translational energy was found to be not as effective as exciting the C--C stretching vibration in promoting the reaction. The results indicate that the H atom transfer from H/sub 2/ to the C atom should have a late barrier, but the C--C stretching vibration of C/sub 2/H/sup +//sub 2/ is apparently coupled to the reaction coordinate. Because the C--C bond in C/sub 2/H/sup +//sub 3/ is expected to be longer than that of C/sub 2/H/sup +//sub 2/, vibrational energy added to the C--C bond might reduce the barrier for H atom transfer from H/sub 2/ to a C atom in C/sub 2/H/sup +//sub 2/.

• Research Organization: Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Chemistry, University of California, Berkeley, California 94720
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6162849
• Journal Information: J. Chem. Phys.; (United States), Vol. 81:12
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ACETYLENE
ION-MOLECULE COLLISIONS
HYDROGEN
CHEMICAL REACTIONS
EXCITATION
MOLECULAR BEAMS
MOLECULAR IONS
VIBRATIONAL STATES
ALKYNES
BEAMS
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDROCARBONS
ION COLLISIONS
IONS
MOLECULE COLLISIONS
NONMETALS
ORGANIC COMPOUNDS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena