
International Journal of Chemical Kinetics p. 637 - 644 (1997)
Update date:2022-08-16
Topics:
Steven Baxley
Henley, Michael V.
Wells
The relative rate technique has been used to measure the hydroxyl radical (OH) reaction rate constant of ethyl 3-ethoxypropionate (EEP, CH3CH2-O-CH2CH2C(O)O-CH 2CH3). EEP reacts with OH with a bimolecular rate constant of (22.9 ± 7.4) × 10-12 cm3 molecule-1 s-1 at 297 ± 3 K and l atmosphere total pressure. In order to more clearly define EEP's atmospheric reaction mechanism, an investigation into the OH + EEP reaction products was also conducted. The OH + EEP reaction products and yields observed were: ethyl glyoxate (EG, 25 ± 1% HC(=O)C(=O)-O-CH2CH3), ethyl (2-formyl) acetate (EFA, 4.8 ± 0.2%, HC(=O)-CH2-C(=O)-O-CH2CH3), ethyl (3-formyloxy) propionate (EFP, 30 ± 1%, HC(=O)-O-CH2CH2-C(=O)-O-CH2CH3), ethyl formate (EF, 37 ± 1%, HC(=O)O-CH2CH3), and acetaldehyde (4.9 ± 0.2%, HC(=O)CH3). Neither the EEP's OH rate constant nor the OH/EEP reaction products have been previously reported. The products' formation pathways are discussed in light of current understanding of oxygenated hydrocarbon atmospheric chemistry.
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