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Kinetics of OH reactions with aliphatic thiols

✍ Scribed by P. H. Wine; R. J. Thompson; D. H. Semmes

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 619 KB
Volume: 16
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550161215

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✦ Synopsis

The kinetics of OH reactions with 1-4 carbon aliphatic thiols have been investigated over the temperature range 252-430 K. OH radicals were produced by flash photolysis of water vapor at h > 165 nm and detected by time-resolved resonance fluorescence spectroscopy. All thiols investigated react with OH at nearly the same rate; k(298 K) = 3.2-4.6 X lo-'' cm3 molecule-' s-', -E,,, = 0.6-1.0 kcal/mol, A = 0.6-1.2 X lo-'' cm3 molecule-' s-'. CH,SH and CH,SD react with OH at identical rates over the entire temperature range investigated. We conclude that the dominant reaction pathway is addition to the sulfur atom.

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