Atmospheric chemistry of selected hydroxycarbonyls
Using a relative rate method, rate constants have been measured at 296 {+-} 2 K for the gas-phase reactions of the OH radical with 1-hydroxy-2-butanone, 3-hydroxy-2-butanone, 1-hydroxy-3-butanone, 1-hydroxy-2-methyl-3-butanone, 3-hydroxy-3-methyl-2-butanone, and 4-hydroxy-3-hexanone, with rate constants (in units of 10{sup {minus}12} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}) of 7.7 {sup {minus}} 1.7, 10.3 {+-} 2.2, 8.1 {+-} 1.8, 16.2 {+-} 3.4, 0.94 {+-} 0.37, and 15.1 {+-} 3.1, respectively, where the error limits include the estimated overall uncertainty in the rate constant for the reference compound. Rate constants were also measured for reactions with NO{sub 3} radicals and O{sub 3}. Rate constants for the NO{sub 3} radical reactions (in units of 10{sup {minus}16} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}) were 1-hydroxy-2-butanone, <9; 3-hydroxy-2-butanone, 6.5 {+-} 2.2; 1-hydroxy-3-butanone, 22; 1-hydroxy-2-methyl-3-butanone, 22; 3-hydroxy-3-methyl-2-butanone, 2; and 4-hydroxy-3-hexanone, 12 {+-} 4, where the error limits include the estimated overall uncertainties in the rate constants of <1.1 x 10{sup {minus}19} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1} were derived for all six hydroxycarbonyls. The dominant tropospheric loss process for the hydroxycarbonyls studied here is calculated to be by reaction with the OH radical.
- Research Organization:
- Univ. of California, Riverside, CA (US)
- OSTI ID:
- 20034420
- Journal Information:
- Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory, Journal Name: Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory Journal Issue: 17 Vol. 104; ISSN 1089-5639; ISSN JPCAFH
- Country of Publication:
- United States
- Language:
- English
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