Carbonyl products of the gas phase reaction of ozone with symmetrical alkenes

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Environmental Science and Technology

DOI:https://doi.org/10.1021/es950828z· OSTI ID:263214

Grosjean, E; Grosjean, D ^[1]

---

1. DGA, Inc., Ventura, CA (United States)

In this study, carbonyl products have been identified and their yields measured in experiments involving the gas phase reaction of ozone with the eight symmetrical alkenes ethylene, cis-3-hexene, cis-4-octene, trans-4-octene, cis-5-decene, trans-5-decene, trans-2, 5-dimethyl-3-hexene, and (cis+trans)-3,4-dimethyl-3-hexene in purified air. Sufficient cyclohexane was added to scavenge the hydroxyl radical (OH) in order to minimize the reaction of OH with the alkenes and with their carbonyl products. Formation yields (carbonyl formed/ozone reacted) of primary carbonyls were close to the value of 1.0 that is consistent with simple reaction mechanism. Carbonyls other than the primary carbonyls R{sub 1}COR{sub 2} were identified as products. Their formation is discussed in terms of subsequent reactions of the R{sub 1}R{sub 2}COO biradicals CH{sub 3}CH{sub 2}CHOO, CH{sub 3}(CH{sub 2}){sub 2}CHOO, CH{sub 3}(CH{sub 2}){sub 3}CHOO, (CH{sub 3}){sub 2}CHCHOO, and C{sub 2}H{sub 5}C(CH{sub 3})OO. Similarities and differences are discussed for cis and trans isomers and for biradical reactions as a function of the nature and number of the substituents. The results are compared to those for the biradicals H{sub 2}COO, CH{sub 3}CHOO, and (CH{sub 3}){sub 2}COO from simpler symmetrical alkenes and contribute to a better understanding of the ozone-alkene reaction under atmospheric conditions. 51 refs., 1 fig., 3 tabs.

• OSTI ID: 263214
• Journal Information: Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 6 Vol. 30; ISSN 0013-936X; ISSN ESTHAG
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
ALKENES
ATMOSPHERIC CHEMISTRY
CARBONYLS
ETHYLENE
EXPERIMENTAL DATA
HEXENES
HYDROXYL RADICALS
OCTENES
OZONE
PHOTOCHEMICAL REACTIONS
SYNTHESIS