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FTIR product study of the self-reaction of β-hydroxyethl peroxy radicals

✍ Scribed by I. Barnes; K.H. Becker; L. Ruppert

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
647 KB
Volume
203
Category
Article
ISSN
0009-2614

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✦ Synopsis

Using long-path FTIR absorption spectroscopy, the products of the self-reaction of P-hydroxyethyl peroxy radicals (HOCH2CH202) produced by the 254 nm photolysis of 2-iodoethanol and ethene/H,Oz have been investigated at 295 ? 3 K for various total pressures (NZ+02) and different O2 partial pressures. From the observed products, glycolaldehyde, ethanediol and formaldehyde, a branching ratio IX= k,,/ (k,, + Icgb) = 0.5 k 0.1 has been obtained for the radical-producing channel of the selfreaction. a-hydroxyethyl hydroperoxide (HOCH2CH200H) was also observed as a product and the first IR spectrum of this compound is reported. Preliminary studies on the products of the reaction of OH with 1,2-ethanediol, which results mainly in the formation of glycolaldehyde, are also presented.

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