Rate constants for the reaction of HO/sub 2/ with HO/sub 2/, SO/sub 2/, CO, N/sub 2/O, trans-2-butene, and 2,3-dimethyl-2-butene at 300 K

Journal Article · Mon Jan 01 00:00:00 EST 1979 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100475a002· OSTI ID:5359645

Graham, R A; Winer, A M; Atkinson, R; Pitts, Jr, J N

Relative rate constants have been measured at 300 K and 1 atm total pressure for reactions of HO/sub 2/ with HO/sub 2/, SO/sub 2/, CO, N/sub 2/O, trans-2-butene, and 2,3-dimethyl-2-butene. The thermal decomposition of HO/sub 2/NO/sub 2/ was used as a source of HO/sub 2/ radicals, and rate constants were measured relative to that of HO/sub 2/ + NO/sub 2/ reaction. A rate constant of 3.8 x 10-12 cm3/molecule/s (total uncertainty is a factor of 2) was measured for the HO/sub 2/ disproportionation reaction; the good agreement of this value with the average literature value of approx 3 x 10-12 cm3/molecule/s supports the validity of the present experimental techniques. Rate constate upper limits of 1 x 10/sup -18/, 2 x 10/sup -20/, and 4 x 10/sup -18/ cm3/molecule/S were obtained for the reactions of HO/sub 2/ with SO/sub 2/, N/sub 2/O, and trans-2-butene, respectively; these values indicate that the reactions will be of negligible atmospheric importance. Significant reaction rates were observed with CO and 2,3-dimethyl-2-butene and may correspond to HO/sub 2/ rate constants as large as 2 x 10-19 and 4 x 10-17 cm3/molecule/S, respectively; these values must be regarded as only upper limits because of the possible effects of large amounts of the reactants on HO/sub 2/NO/sub 2/ in the gas phase or on the cell surfaces.

• OSTI ID: 5359645
• Journal Information: J. Phys. Chem.; (United States), Vol. 83:12
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BUTENES
REACTION KINETICS
CARBON MONOXIDE
NITROGEN DIOXIDE
NITROUS OXIDE
OXYGEN COMPOUNDS
SULFUR DIOXIDE
HYDROXYL RADICALS
LOW PRESSURE
MEDIUM TEMPERATURE
ALKENES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
HYDROCARBONS
KINETICS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
RADICALS
SULFUR COMPOUNDS
SULFUR OXIDES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)