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Rate constants for the gas-phase reactions of Ozone with unsaturated Aliphatic Alcohols

โœ Scribed by Eric Grosjean; Daniel Grosjean

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
431 KB
Volume
26
Category
Article
ISSN
0538-8066

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โœฆ Synopsis

The gas-phase reaction of ozone with unsaturated alcohols in air has been investigated a t atmospheric pressure and ambient temperature (288-291 K). Cyclohexane was added to scavenge the hydroxyl radical which forms as a product of the ozone-unsaturated alcohol reaction. The reaction rate constants, in units of cm3 molecule-' s-l, are 16.2 +-0.7 for (2) 3-buten-2-01, 17.9 2 1.8 for 1-penten-3-01, 10.0 +-0.3 for 2-methyl-3-buten-2-01, 169 t 25 for cis-2 penten-1-01, and 251 2 41 for 2-buten-1-01 (mixture of isomers). Substituent effects on reactivity are discussed. The reactivity of unsaturated alcohols towards ozone is similar to that of their alkene structural homologues. Implications of these results with respect to the atmospheric persistence of unsaturated alcohols are briefly discussed.

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## Abstract A bimolecular rate constant, __k__~OH + dihydromyrcenol~, of (38 ยฑ 9) ร— 10^โˆ’12^ cm^3^ molecule^โˆ’1^ s^โˆ’1^ was measured using the relative rate technique for the reaction of the hydroxyl radical (OH) with 2,6โ€dimethylโ€7โ€octenโ€2โ€ol (dihydromyrcenol,) at 297 ยฑ 3 K and 1 atm total pressure.

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