Kinetics study of the reaction of OH radicals with two C$sub 2$ hydrocarbons: C$sub 2$$H$$sub 4$ and C$sub 2$$H$$sub 2$
The flash photolysis-resonance fluorescence technique has been utilized to study the kinetics of hydroxyl radical reactions with ethylene and acetylene at 300 K over a wide range of experimental conditions. (1) OH+C$sub 2$$H$$sub 4$ $Yields$/subk/1 Products (e.g., C$sub 2$$H$$sub 5$O), (2) OH+C$sub 2$$H$$sub 2$ $Yields$/subk/1 Products (e.g.,C$sub 2$$H$$sub 2$O+H). The bimolecular rate constant for Reaction (1) was observed to increase from (2.24 to 5.33) x 10$sup - 12$ cm$sup 3$ molecule center-dot sec$sup -1$ as the total pressure varied from (3--300) torr of helium. The rate of Reaction (2) was invarient with total pressure, and the value obtained for k$sub 2$ was (1.65plus-or-minus0.15) times 10$sup -13$ cm$sup 2$ moleculecenter-dotsec$sup -1$. The observed pressure dependency of Reaction (1) brings the existing literature values for k$sub 1$ into close agreement. Reaction (2) has been shown to be particularly sensitive to secondary processes and this is discussed in some detail.
- Research Organization:
- Chemistry Department, University of Maryland, College Park, Maryland 20742
- NSA Number:
- NSA-33-000094
- OSTI ID:
- 4171678
- Journal Information:
- J. Chem. Phys., v. 63, no. 5, pp. 1707-1712, Journal Name: J. Chem. Phys., v. 63, no. 5, pp. 1707-1712; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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