Kinetics and mechanism of the OH + HO2 reaction

James J. Schwab, William Henry Brune, James G. Anderson

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A discharge flow reactor with laser magnetic resonance and resonance fluorescence detection axes is used to measure the rate constant for the reaction of OH and HO2 radicals by measuring the decay of OH in excess HO2 under pseudo-first-order conditions. Particular care is taken to reduce impurity O and H atoms to low levels since their presence leads to an underestimate of the rate constant. The rate constant is measured to be (8.0-2.0 +3.0) × 10-11 cm3 molecule-1 s-1 at 298 K and 2 Torr after a small (3%) correction is made for the impurity atoms. It is argued that recent experimental and theoretical results indicate that the reaction mechanism is likely dominated by attack at the hydrogen end of HO2 and that the reaction is unusually fast due a long-range attractive interaction.

Original languageEnglish (US)
Pages (from-to)1030-1035
Number of pages6
JournalJournal of Physical Chemistry
Volume93
Issue number3
StatePublished - Dec 1 1989

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Rate constants
Kinetics
kinetics
Impurities
impurities
Atoms
resonance fluorescence
Magnetic resonance
attack
atoms
magnetic resonance
Hydrogen
Fluorescence
reactors
Molecules
Lasers
decay
hydrogen
lasers
molecules

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Schwab, J. J., Brune, W. H., & Anderson, J. G. (1989). Kinetics and mechanism of the OH + HO2 reaction. Journal of Physical Chemistry, 93(3), 1030-1035.
Schwab, James J. ; Brune, William Henry ; Anderson, James G. / Kinetics and mechanism of the OH + HO2 reaction. In: Journal of Physical Chemistry. 1989 ; Vol. 93, No. 3. pp. 1030-1035.
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Schwab, JJ, Brune, WH & Anderson, JG 1989, 'Kinetics and mechanism of the OH + HO2 reaction', Journal of Physical Chemistry, vol. 93, no. 3, pp. 1030-1035.

Kinetics and mechanism of the OH + HO2 reaction. / Schwab, James J.; Brune, William Henry; Anderson, James G.

In: Journal of Physical Chemistry, Vol. 93, No. 3, 01.12.1989, p. 1030-1035.

Research output: Contribution to journalArticle

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