Premium
Rate constants for the gas‐phase reactions of ozone with unsaturated alcohols, esters, and carbonyls
Author(s) -
Grosjean Daniel,
Grosjean Eric,
Williams Edwin L.
Publication year - 1993
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550250909
Subject(s) - chemistry , ozone , gas phase , reaction rate constant , phase (matter) , organic chemistry , computational chemistry , kinetics , physics , quantum mechanics
The kinetics of the gas‐phase reaction of ozone with unsaturated alcohols, carbonyls, and esters in air have been investigated at atmospheric pressure, ambient temperature (285–295 K), and in the presence of sufficient cyclohexane to scavenge the hydroxyl radical which forms as a product of the ozone‐unsaturated compound reaction. The reaction rate constants, in units of 10 −18 cm 3 molecule −1 s −1 , are 0.26 ± 0.05 for acrolein, 1.07 ± 0.05 for 2‐ethyl acrolein, 6.0 ± 0.4 for ethyl vinyl ketone, 4.9 ± 0.4 for 3‐buten‐1‐ol, 14.4 ± 2.0 for allyl alcohol, 105 ± 7 for cis ‐3‐hexen‐1‐ol, 7.5 ± 0.9 for methyl methacrylate, 2.9 ± 0.3 for vinyl acetate, 4.4 ± 0.3 for methyl crotonate, and 8.1 ± 0.3 for the 1,1‐disubstituted alkene 2‐ethyl‐1‐butene. Substituent effects on reactivity are discussed by comparison with alkenes and indicate that the reactivity of unsaturated alcohols is the same as that of alkene structural homologues and that the —C(O)OR, —C(O)R, and —CHO groups decrease the reactivity towards ozone as compared to alkyl groups. Estimates are made of the atmospheric persistence of these unsaturated compounds using the kinetic data obtained in this study as input to structure‐reactivity and linear free‐energy relationships. © 1993 John Wiley & Sons, Inc.