Rate constant and mechanism for the reaction of hydroxyl radical with formic acid
The rate constants for the reaction of OH with the monomer and dimer of formic acid have been determined at 296 K by a laser photolysis-resonance absorption technique. The OH radicals were generated by photolysis of formic acid at 222 nm with a KrCl excimer laser and were monitored by time-resolved absorption at several resonance lines of the (0,0) band of the A/sup 2/..sigma../sup +/-X/sup 2/II transition. The rate constant for the monomer was found to be 2.95 x 10/sup 11/ cm/sup 3/ mol/sup -1/ s/sup -1/. The dimer is much less reactive. Experiments with small amounts of oxygen added indicate that H atoms are formed during the reaction. The results can be interpreted as indicating significantly more abstraction of hydrogen by OH from the -OH bond than from the -CH bond of formic acid.
- Research Organization:
- National Research Council of Canada, Ottawa, Ontario
- OSTI ID:
- 7005757
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:24; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION
ATMOSPHERIC CHEMISTRY
CARBOXYLIC ACIDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
DIMERS
EXPERIMENTAL DATA
FORMIC ACID
HYDROXYL RADICALS
INFORMATION
KINETICS
LASERS
MEDIUM TEMPERATURE
MONOCARBOXYLIC ACIDS
MONOMERS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
RESONANCE ABSORPTION