Rate constants for the reactions of OH with CH$sub 4$ and fluorine, chlorine, and bromine substituted methanes at 296$sup 0$K
The absolute rate constants for the reactions of OH radicals with CH$sub 4$ and fifteen fluorine, chlorine, and bromine substituted methane molecules were measured using a discharge flow system and laser magnetic resonance detection of OH. Measurements were made at 296$sup 0$K and at pressures between 107 and 1300 Pa. Results indicate that the reaction mechanism involves the abstraction of a hydrogen atom and formation of H$sub 2$O and a methyl type radical product. Completely halogenated methane molecules are found to be relatively unreactive. Hydrogen containing molecules react with rate constants ranging from about 0.2 to 160 x 10$sup -15$ cm$sup 3$/molecule.s. The reactivity increases with decreasing carbon--hydrogen bond energies. Rough estimates are made of the Arrhenius parameters for the reactions. (auth)
- Research Organization:
- Aeronomy Lab., Boulder, CO
- NSA Number:
- NSA-33-025466
- OSTI ID:
- 4025680
- Journal Information:
- J. Chem. Phys., v. 64, no. 1, pp. 197-202, Journal Name: J. Chem. Phys., v. 64, no. 1, pp. 197-202; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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