Kinetic measurements of the gas-phase reactions of OH radicals with hydroxy ethers, hydroxy ketones, and keto ethers
- National Institute of Standards and Technology, Gaithersburg, MD (USA)
Absolute rate constants were determined for the gas-phase reactions of hydroxyl radicals with a series of hydroxy ethers as well as the simplest hydroxy ketone and keto ether with use of the flash photolysis resonance fluorescence technique. At 298 K, the measured rate constants were as follows (in units of 10{sup {minus}12} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}): 2-methoxyethanol, 12.5 {plus minus} 0.7; 2-ethoxyethanol, 18.7 {plus minus} 2.0; 2-butoxyethanol, 23.1 {plus minus} 0.9; 3-ethoxy-1-propanol, 22.0 {plus minus} 1.3; 3-methoxy-l-butanol, 23.6 {plus minus} 1.6; acetol, 3.0 {plus minus} 0.3; and methoxyacetone, 6.8 {plus minus} 0.6. The kinetic data for 2-methoxyethanol obtained between 240 and 440 K were used to derive the following Arrhenius expression: k{sub 1} = (4.5 {plus minus} 1.4) {times} 10{sup {minus}12} exp((325 {plus minus} 100)/T) (cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}). The results for all seven reactants are discussed in terms of the prediction of OH rate constants for oxygenated organic compounds.
- OSTI ID:
- 6985920
- Journal Information:
- Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:23; ISSN JPCHA; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400000* -- Chemistry
400500 -- Photochemistry
CHEMICAL REACTIONS
DATA
DATA ANALYSIS
DECOMPOSITION
ETHERS
EXPERIMENTAL DATA
HYDROXYL RADICALS
INFORMATION
KETONES
KINETICS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS