RATE CONSTANTS FOR THE GAS-PHASE REACTIONS OF OZONE WITH UNSATURATED ALIPHATIC-ALCOHOLS

The gas-phase reaction of ozone with unsaturated alcohols in air has b een investigated at atmospheric pressure and ambient temperature (288- 291 K). Cyclohexane was added tb scavenge the hydroxyl radical which f orms as a product of the ozone-unsaturated alcohol reaction. The react ion rate constants, in units of 10(-18) cm(3) molecule(-1) s(-1), are 16.2 +/- 0.7 for (+/-) 3-buten-2-ol, 17.9 +/- 1.8 for 1-penten-3-ol, 1 0.0 +/- 0.3 for 2-methyl-3-buten-2-ol, 169 +/- 25 for cis-2 penten-1-o l, and 251 +/- 41 for 2-buten-1-ol (mixture of isomers). Substituent e ffects on reactivity are discussed. The reactivity of unsaturated alco hols towards ozone is similar to that of their alkene structural homol ogues. Implications of these results with respect to the atmospheric p ersistence of unsaturated alcohols are briefly discussed. (C) 1994 Joh n Wiley & Sons, Inc.