How rapidly does the SH radical react with N{sub 2}O?

The reaction of SH radical with N{sub 2}O was investigated by using two complementary experimental methods: (1) a pulsed photolysis apparatus where SH was detected via laser-induced fluorescence and (2) a discharge flow tube where SH was detected via chemical ionization mass spectrometry. The rate c...

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Bibliographic Details
Published in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 1999-08, Vol.103 (34)
Main Authors: Herndon, S.C., Froyd, K.D., Lovejoy, E.R., Ravishankara, A.R.
Format: Article
Language:English
Subjects:
ATMOSPHERIC CHEMISTRY
CHEMICAL REACTION KINETICS
ENVIRONMENTAL SCIENCES
HYDROGEN SULFIDES
NITROUS OXIDE
PHOTOLYSIS
RADICALS
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Summary:The reaction of SH radical with N{sub 2}O was investigated by using two complementary experimental methods: (1) a pulsed photolysis apparatus where SH was detected via laser-induced fluorescence and (2) a discharge flow tube where SH was detected via chemical ionization mass spectrometry. The rate coefficient for this reaction, {kappa}{sub 1}, was found to be less than 5 x 10{sup {minus}16} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1} at 298 K, in contrast to the large value reported in the literature. Secondary reactions were deduced to be unimportant in the system. Some possible reasons for the previously reported high value are presented. The low value of {kappa}{sub 1} makes the oxidation of SH by N{sub 2}O and removal of N{sub 2}O by SH unimportant in the earth's atmosphere.
ISSN:1089-5639
1520-5215
DOI:10.1021/jp9911853