Diode laser study of the NCO + NO[sub 2] reaction

Journal Article · Thu Dec 23 04:00:00 EST 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100153a037· OSTI ID:5145589

Park, J; Hershberger, J F ^[1]

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1. North Dakota State Univ., Fargo, ND (United States)

Infrared diode laser absorption spectroscopy was used to investigate the kinetics and product channels of the NCO + NO[sub 2] reaction. The total rate constant was fit to the form k = 10[sup [minus]] 11.38 [+-] 0.06 exp[(441 [+-] 53)/T] over the temperature range 298-500 K. The major product channel was CO[sub 2] + N[sub 2]O, accounting for 91.7 [+-] 4.0% of the total observed products; CO + 2NO accounted for the remaining 8.3 + 4.0%. The energy disposal into the [nu][sub 3] mode of the CO[sub 2] product was also measured. A value of [l angle]f[sub [nu]3][r angle] = 5.9 [+-] 2.0% was determined. The results are consistent with formation of a long-lived O[sub 2]NNCO collision complex with a roughly statistical distribution of internal energy. Concerted dissociation via a four-center transition state leads to the primary products. 38 refs., 5 figs., 2 tabs.

• DOE Contract Number: FG06-93ER14390
• OSTI ID: 5145589
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:51; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400500 -- Photochemistry
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ABSORPTION SPECTRA
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION KINETICS
COMPLEXES
DECOMPOSITION
KINETICS
LASERS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
NITROUS OXIDE
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
SPECTRA
THERMODYNAMICS