Photooxidation of methyl sulfide, ethyl sulfide, and methanethiol
Products of sunlight-irradiated mixtures of oxides of nitrogen and alkyl sulfides (RSR, R = CH/sub 3/, C/sub 2/H/sub 5/) and methanethiol (CH/sub 3/SH) in air include formaldehyde (R = CH/sub 3/), acetaldehyde and PAN (R = C/sub 2/H/sub 5/), sulfur dioxide, and alkyl nitrates (RONO/sub 2/) as well as particulate alkanesulfonic acids (RSO/sub 2/OH) and inorganic sulfate. The nature and yields of gaseous and particulate products are discussed in terms of OH-initiated reaction pathways, including C-S bond scission, and subsequent reactions of alkythiyl radicals (RS), including those leading to photolabile RSNO and stable RSNO/sub 2/ products for which indirect evidence is presented. SO/sub 2/ yields are found to vary according to the relative importance of the competing pathways RS + O/sub 2/ (a) and RS + NO/sub 2/ (b), for which a ratio k/sub b/ / k/sub a/ approx. 2 x 10/sup 6/ is derived from data for irradiated RSR-NO/sub x/, RSH-Cl/sub 2/, and RSH-Cl/sub 2/-NO/sub 2/ mixtures.
- Research Organization:
- Environmental Research and Technology, Inc., Westlake Village, CA
- OSTI ID:
- 6229306
- Journal Information:
- Environ. Sci. Technol.; (United States), Vol. 18:6
- Country of Publication:
- United States
- Language:
- English
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ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACETALDEHYDE
CHEMICAL REACTIONS
FORMALDEHYDE
PARTICULATES
PEROXYACETYL NITRATE
SULFATES
SULFIDES
PHOTOCHEMISTRY
SULFONIC ACIDS
SULFUR DIOXIDE
THIOLS
ALDEHYDES
CHALCOGENIDES
CHEMISTRY
ESTERS
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
SULFUR COMPOUNDS
SULFUR OXIDES
400500* - Photochemistry