Reaction of OH with Dimethyl Sulfide. 2. Products and Mechanisms

The technique of pulsed laser photolysis/pulsed laser-induced fluorescence was used to determine products of the following reactions:  OH + CH3SCH3 → products (1) and CH3S(OH)CH3 + O2 → products (5). The non-adduct-forming channel of reaction 1 was observed to proceed via hydrogen abstraction (branc...

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Veröffentlicht in:Journal of physical chemistry (1952) 1996-08, Vol.100 (35), p.14703-14713
Hauptverfasser: Turnipseed, Andrew A, Barone, Stephen B, Ravishankara, A. R
Format: Artikel
Sprache:eng
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Zusammenfassung:The technique of pulsed laser photolysis/pulsed laser-induced fluorescence was used to determine products of the following reactions:  OH + CH3SCH3 → products (1) and CH3S(OH)CH3 + O2 → products (5). The non-adduct-forming channel of reaction 1 was observed to proceed via hydrogen abstraction (branching ratio, Φabs = 0.84 ± 0.26) at 298 K. Direct formation of CH3S from reaction 1 was not observed (ΦCH 3 S < 0.04). A small channel for producing CH3 and CH3SOH in the non-adduct-forming route could not be ruled out. HO2 was found to be produced from reaction 5 with a yield of 0.50 ± 0.15 at 234 and 258 K. An upper limit for the production of OH from reaction 5 was determined to be ΦOH < 0.05. The atmospheric implications of the results from this and the accompanying paper are discussed.
ISSN:0022-3654
1541-5740
DOI:10.1021/jp960867c