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Reaction between nitric oxide and ozone in solid nitrogenNitrogen dioxide, NO2, is produced when nitric oxide, NO, and ozone, O3, are suspended in a nitrogen matrix at 11-20 K. The NO2 is formed with first-order kinetics, a 12 K rate constant of (1.4 + or - 0.2) x 0.00001/sec, and an apparent activation energy of 106 + or - 10 cal/mol. Isotopic labeling, variation of concentrations, and cold shield experiments show that the growth of NO2 is due to reaction between ozone molecules and NO monomers, and that the reaction is neither infrared-induced nor does it seem to be a heavy atom tunneling process. Reaction is attributed to nearest-neighbor NO.O3 pairs probably held in a specific orientational relationship that affects the kinetic behavior. When the temperature is raised, more such reactive pairs are generated, presumably by local diffusion. Possible mechanisms are discussed.
Document ID
19790065489
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lucas, D.
(California, University Berkeley, Calif.; Indiana University, Bloomington, Ind., United States)
Pimentel, G. C.
(California, University Berkeley, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
September 6, 1979
Publication Information
Publication: Journal of Physical Chemistry
Volume: 83
Subject Category
Inorganic And Physical Chemistry
Accession Number
79A49502
Funding Number(s)
CONTRACT_GRANT: NGL-05-003-286
Distribution Limits
Public
Copyright
Other

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