Relative rate constants for the reactions of OH radicals with isopropyl alcohol, diethyl and DI- n-propyl ether at 305 ± 2 K

Abstract

Relative rate constants have been obtained for the reaction of the hydroxyl radical (OH) with isopropyl alcohol and diethyl and di- n-propyl ether in environmental chamber photooxidation studies employing hydrocarbon—NO x mixtures in air at 1 atmosphere and 305 ± 2 K. These results were obtained from measurements of the relative rates of disappearance of these compounds on the previously validated basis that OH radicals are dominantly responsible for their disappearance in the initial stages of reaction under the experimental conditions employed. Absolute rate constants, obtained by using the published rate constant for OH + isobutene of 3.05 × 10 10 ℓ mole −1 s −1 are ( k × 10 −9 ℓ mole −1 s −1): isopropyl alcohol, 4.3 ± 1.3, diethyl ether, 5.6 ± 1.1; and di- n-propyl ether, 10.4 ± 2.1. No previous determinations of these rate constants have been reported.