Photochemistry of O/sub 3//HNCO mixtures

Journal Article · Thu Oct 06 04:00:00 EDT 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100331a011· OSTI ID:5992873

Ongstad, A P; Liu, X; Coombe, R D

Pulsed photolysis of gaseous O/sub 3//HNCO mixtures at 249 nm produces emission from the NH A/sup 3/II ..-->.. X/sup 3/..sigma../sup -/ transition near 336 nm. The data suggest that the excited NH is produced by the reaction O(/sup 1/D) + HNCO ..-->.. NH + CO/sub 2/. The branching fraction to the alternate products OH + NCO is less than 0.1. This mechanism is quite different from that of the analogous O(/sup 1/D) + HN/sub 3/, NH(/sup 1/..delta..) + HN/sub 3/, and NH(/sup 1/..delta..) + HNCO reactions. From the time profile of the NH emission, the rate constant for O(/sup 1/D) + HNCO is determined to be (4.6 /plus minus/ 0.4) /times/ 10/sup /minus/11/ cm/sup 3/s/sup /minus/1/.

• Research Organization: Univ. of Denver, CO (USA)
• OSTI ID: 5992873
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:20; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ABSORPTION SPECTROSCOPY
CARBONIC ACID DERIVATIVES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
FOURIER TRANSFORM SPECTROMETERS
INFORMATION
INFRARED SPECTRA
ISOCYANIC ACID
KINETICS
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OZONE
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PULSE TECHNIQUES
REACTION KINETICS
SPECTRA
SPECTROMETERS
SPECTROSCOPY
ULTRAVIOLET SPECTRA