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Relative rate measurements of some reactions of hydroxyl radicals with alkanes studied under atmospheric conditions

✍ Scribed by Stephen J. Harris; J. Alistair Kerr

Publisher: John Wiley and Sons
Year: 1988
Tongue: English
Weight: 592 KB
Volume: 20
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550201203

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✦ Synopsis

A flow system has been developed to study relative rate coefficients of hydroxyl radicals reacting with alkanes under conditions relating to tropospheric chemistry. Relative Arrhenius parameters have been measured over the temperature range 243-328 K for pairs of alkanes from a list consisting of n-butane, 2-methylpropane, n-pentane, n-hexane, 2,2-and 2,3-dimethylbutane, 2,3,3-trimethylbutane, and 2,3,4-trimethylpentane.

The results have been incorporated into a Structure-Activity Relation for hydroxylalkane reactions which leads to the following group rate coefficients for a temperature range of 240-500 K. k:,,, = 3.13 x lo-" exp(-904/T) cm3 molecule-'s-' ke, = 2.45 X lo-'' exp(-320/T) cm3 molecule-' s-' k:~ = 1.88 X lo-'' cm3 molecule-' s-l *To whom correspondence should be addressed.

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