Collisional removal of CH/sub 2/(/sup 1/A/sub 1/): absolute rate constants for atomic and molecular collisional partners at 295 K
Journal Article
·
· J. Chem. Phys.; (United States)
OSTI ID:6050146
The technique of cw laser resonance absorption has been used to monitor the time evolution of individual CH/sub 2/(/sup 1/A/sub 1/) rotational levels following the excimer laser photolysis of CH/sub 2/CO. Absolute rate constants for the removal of CH/sub 2/(/sup 1/A/sub 1/) by He, Ar, Kr, N/sub 2/, CO, O/sub 2/, CH/sub 4/, C/sub 2/H/sub 6/, C/sub 3/H/sub 8/, C/sub 2/H/sub 4/, i-C/sub 4/H/sub 8/, and CH/sub 2/CO have been determined at 295 K. Removal efficiencies range from nearly gas-kinetic for the higher hydrocarbons and CH/sub 2/CO to 10/sup -2/ for He. For He, Ar, and CH/sub 2/CO removal rates were measured for the v/sub 2/ = 1 excited bending vibrational level and found to be identical to the ground state rates. Pseudo-first-order rate constants for equilibration of the nascent rotational distribution in collisions with He and CH/sub 2/CO were found to be factors of 17 and 2.7 faster than the respective removal rates.
- Research Organization:
- Department of Chemistry, University of California
- OSTI ID:
- 6050146
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 78:11; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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·
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Related Subjects
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKANES
ALKENES
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COLLISIONS
DECOMPOSITION
ELEMENTS
ENERGY LEVELS
ETHANE
ETHYLENE
EXCITED STATES
FLUIDS
GASES
HELIUM
HYDROCARBONS
KETENES
KINETICS
KRYPTON
METHANE
METHYLENE RADICALS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROPANE
RADICALS
RARE GASES
REACTION KINETICS
ROTATIONAL STATES
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKANES
ALKENES
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COLLISIONS
DECOMPOSITION
ELEMENTS
ENERGY LEVELS
ETHANE
ETHYLENE
EXCITED STATES
FLUIDS
GASES
HELIUM
HYDROCARBONS
KETENES
KINETICS
KRYPTON
METHANE
METHYLENE RADICALS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROPANE
RADICALS
RARE GASES
REACTION KINETICS
ROTATIONAL STATES