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625149 
Journal Article 
Atmospheric chemistry of toxic contaminants 5. Unsaturated halogenated aliphatics: Allyl chloride, chloroprene, hexachlorocyclopentadiene, vinylidene chloride 
Grosjean, D 
1991 
Yes 
Journal of the Air and Waste Management Association
ISSN: 1096-2247
EISSN: 2162-2906 
AIR & WASTE MANAGEMENT ASSOC 
PITTSBURGH 
BIOSIS/91/12437 
41 
2 
182-189 
English 
WOS:A1991EY53800009 
Detailed mechanisms are outlined for the chemical reactions involved in the atmospheric removal of four unsaturated chlorinated aliphatic contaminants, allyl chloride, chloroprene, hexachlorocyclopentadiene and vinylidene chloride. Rate constants estimated from structure-reactivity relationships indicate rapid removal for all four compounds by reactions with OH (major), ozone, and No{sub 3}, with half-lives of 2-16 hrs for removal by reaction with OH. Reaction products of allyl chloride (formaldehyde, chloroacetaldehyde, peroxychloroacetyl nitrate) and vinylidene chloride (formaldehyde, phosgene, chloroacetyl chloride) are consistent with OH addition-initiated pathways that include Cl atom elimination. The chlorine atoms produced in the OH reaction sequence react rapidly with all four unsaturated compounds, but these reactions are of negligible importance for atmospheric removal of the four toxic contaminants studied. Analogous mechanisms are discussed for chloroprene (leading to formaldehyde, CH{sub 2} {double bond} CClCHO, and ClCOCHO) and for hexachlorocyclopentadiene (leading to oxalyl chloride and ClCOCCl{sub 2}COCl). 
Biochemical Methods-General; Biochemical Studies-General; Biophysics-Molecular Properties and Macromolecules; Toxicology-Environmental and Industrial Toxicology; Public Health: Environmental Health-Air