Role of the α-hydroxyethylperoxy radical in the reactions of acetaldehyde and vinyl alcohol with HO2

Document Type

Article

Publication Date

12-21-2009

Abstract

The title reactions have been studied theoretically. At atmospheric conditions the acetaldehyde + HO2 reaction forms the α-hydroxyethylperoxy radical with rate constant of around 1011 cm3 mol-1 s-1. Further reaction of α-hydroxyethylperoxy with NO occurs for NO levels above around 10 ppb. Reaction with HO2 is therefore predicted to be a major sink of aldehydes in highly polluted areas, producing carboxylic acids and ozone. The reaction of vinyl alcohol with HO2 can be rapid at combustion temperatures, forming acetaldehyde + HO2 and α-hydroxyethyl + O2 products. This reaction achieves the isomerization of vinyl alcohol to acetaldehyde at a faster rate than keto-enol tautomerization, given suitably high levels of HO2. © 2009 Elsevier B.V.

Identifier

72049097389 (Scopus)

Publication Title

Chemical Physics Letters

External Full Text Location

https://doi.org/10.1016/j.cplett.2009.10.045

ISSN

00092614

First Page

25

Last Page

29

Issue

1-3

Volume

483

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