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Kinetic study of the reaction CH (X 2Pi) + H2 yields CH2 (X 3B1) + H in the temperature range 372 to 675 KThe kinetics of the reversible reaction CH (X 2Pi) + H2 yields CH2 (X 3B1) + H at 372-675 K and total pressure 100 torr (mainly Ar) is investigated experimentally. The ground-state CH radicals are produced by photolysis of CHBr3 using 10-mJ 266-nm laser pulses (repetition rate 10 Hz) and monitored by measuring the fluorescence induced by a 429.8-nm dye laser, in the apparatus described by Berman et al. (1982) and Berman and Lin (1984). The results are presented in tables and graphs and characterized. The absolute rate constants for the forward and reverse reactions are determined, and their temperature dependence is given by Arrhenius expressions and formulas obtained in transition-state-theory calculations. The heat of formation of CH2 at 0 K is estimated (assuming that the recombination reaction CH2 + H has zero activation energy) as 92.6 + or - 0.5 kcal/mol.
Document ID
19870038280
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Zabarnick, S.
(Naval Research Lab. Washington, DC, United States)
Fleming, J. W.
(Naval Research Lab. Washington, DC, United States)
Lin, M. C.
(U.S. Navy, Naval Research Laboratory, Washington DC, United States)
Date Acquired
August 13, 2013
Publication Date
October 15, 1986
Publication Information
Publication: Journal of Chemical Physics
Volume: 85
ISSN: 0021-9606
Subject Category
Inorganic And Physical Chemistry
Accession Number
87A25554
Distribution Limits
Public
Copyright
Other

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