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Rate constant for the reaction SO + BrO yields SO2 + BrThe rate of the radical-radical reaction SO + BrO yields SO2 + Br has been determined at 298 K in a discharge flow system near 1 torr pressure with detection of SO and BrO via collision-free sampling mass spectrometry. The rate constant was determined using two different methods: measuring the decay of SO radicals in the presence of an excess of BrO and measuring the decay of BrO radicals in excess SO. The results from the two methods are in reasonable agreement and the simple mean of the two values gives the recommended rate constant at 298 K, k = (5.7 + or - 2.0) x 10 to the -11th cu cm/s. This represents the first determination of this rate constant and it is consistent with a previously derived lower limit based on SO2 formation. Comparison is made with other radical-radical reactions involving SO or BrO. The reaction SO + BrO yields SO2 + Br is of interest for models of the upper atmosphere of the earth and provides a potential coupling between atmospheric sulfur and bromine chemistry.
Document ID
19870026927
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Brunning, J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Stief, L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
September 1, 1986
Publication Information
Publication: Journal of Chemical Physics
Volume: 85
ISSN: 0021-9606
Subject Category
Inorganic And Physical Chemistry
Accession Number
87A14201
Distribution Limits
Public
Copyright
Other

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