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Kinetics and mechanism of HO2 and DO2 disproportionationsA flash photolysis/UV abosrption technique was used to study the HO2 + HO2 and DO2 + DO2 reactions in the gas phase. Rate constants were measured at pressures between 100 and 700 torr of Ar and N2, and at temperatures between 230 and 420 K with up to 10 torr of added water vapor. The overall disproportionation rate constants for the reaction is given as the sum of pressure-independent and pressure-dependent terms. A kinetic analysis shows that both reactions have a zero-pressure bimolecular component and a termolecular component which is linearly dependent on pressure up to 700 torr. A priori estimates of the vibrational frequencies of the product of the HO2 + HO2 reaction suggest binding energies of 12-20 kcal per mol (for the initial association).
Document ID
19850039378
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kircher, C. C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sander, S. P.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Journal of Physical Chemistry
Volume: 88
Issue: 10, 1
ISSN: 0022-3654
Subject Category
Inorganic And Physical Chemistry
Accession Number
85A21529
Distribution Limits
Public
Copyright
Other

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