Absolute rate coefficients for methyl radical reactions by laser photolysis, time-resolved infrared chemiluminescence: CD/sub 3/ + HX. -->. CD/sub 3/H + X(X = Br, I)
Journal Article
·
· J. Phys. Chem.; (United States)
Absolute rate coefficients are reported for the room temperature reactions of deuterated methyl radicals with HI and HBr, CD/sub 3/ + HI (HBr) ..-->.. CD/sub 3/H + I(Br). Excimer laser photolysis of CD/sub 3/I is used to generate methyl radicals, and time-resolved infrared chemiluminescence from the CH stretch of the CD/sub 3/H products is detected to follow the time evolution of the reaction. The rate constants obtained in this manner are (7.7 +/- 0.7) x 10/sup -12/ cm/sup 3/ molecule/sup -1/ s/sup -1/ for CD/sub 3/ + HI and (4.7 +/- 0.4) x 10/sup -12/ cm/sup 3/ molecule/sup -1/ s/sup -1/ for CD/sub 3/ + HBr. These rate constants are considerably greater than earlier, indirectly measured values and indicate that the activation energy for these light-atom transfer reactions is lower than previously believed. 53 references, 3 figures, 2 tables.
- Research Organization:
- National Bureau of Standards, Boulder, CO
- OSTI ID:
- 6013233
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:5; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Fri Dec 31 23:00:00 EST 1982
·
OSTI ID:5838044
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
ACTIVATION ENERGY
ALKANES
ALKYL RADICALS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DEUTERIUM COMPOUNDS
ENERGY
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
HYDRIODIC ACID
HYDROBROMIC ACID
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IODINE COMPOUNDS
ISOTOPE EFFECTS
ISOTOPE ENRICHED MATERIALS
KINETICS
MATERIALS
METHANE
METHYL RADICALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
SYNTHESIS
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
ACTIVATION ENERGY
ALKANES
ALKYL RADICALS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DEUTERIUM COMPOUNDS
ENERGY
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
HYDRIODIC ACID
HYDROBROMIC ACID
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IODINE COMPOUNDS
ISOTOPE EFFECTS
ISOTOPE ENRICHED MATERIALS
KINETICS
MATERIALS
METHANE
METHYL RADICALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
SYNTHESIS