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- W2949278439 endingPage "72" @default.
- W2949278439 startingPage "1" @default.
- W2949278439 abstract "The formation of water molecules via hydrogen atom abstraction by hydroxyl radicals and their formation via unimolecular elimination from vibrationally excited alcohols and organic acids are important processes in a variety of gas-phase chemical environments. The nascent vibrational distributions of the water molecules produced by such reactions have been obtained by analysis of the infrared chemiluminescence from H 2 O, HOD and D 2 O. The analysis required computer simulation of the spectra obtained by recording emission from a fast-flow reactor at 298 K with a low-resolution Fourier transform spectrometer. By combining the information deduced from simulation of the H 2 O and HOD emission spectra from the reactions of OH and OD, the total vibrational energy released to the water molecule and the distribution between the stretch and bending modes have been assigned. The present report provides a summary of results from hydroxyl radicals reacting with inorganic hydride molecules, with the primary, secondary and tertiary bonds of hydrocarbons, and with oxygen- and sulphur-containing organic molecules. The overall fraction of the available energy released to water as vibrational energy is 0.55 for direct abstraction of hydrogen atoms by OH radicals. This fraction declines as the mechanism becomes less direct and reaches 0.15-0.20 for the unimolecular decomposition of vibrationally excited ethanol and acetic acid. The ratio of the energy in the bending mode to that in the stretch mode is sensitive to the dynamics of water-forming reactions. Macroscopic mechanisms, vibrational energy distributions and reaction dynamics are discussed." @default.
- W2949278439 created "2019-06-27" @default.
- W2949278439 creator A5011247910 @default.
- W2949278439 creator A5027618659 @default.
- W2949278439 date "2003-01-01" @default.
- W2949278439 modified "2023-09-23" @default.
- W2949278439 title "Infrared chemiluminescence from water-forming reactions: Characterization of dynamics and mechanisms" @default.
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