Hydrogen-atom abstraction from alkanes by OH. 3. Propane

Journal Article · Thu Apr 24 04:00:00 EST 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100400a042· OSTI ID:5682311

Droege, A T; Tully, F P

Absolute rate coefficients for the reactions of the hydroxyl radical with six selectively deuterated isotopes of propane were determined by the laser photolysis/laser-induced fluorescence technique. Kinetic data were obtained at 400-Torr helium pressure over the temperature range 293-854 K. Rate-coefficient results for the OH + C/sub 3/H/sub 8/ ..-->.. H/sub 2/O + C/sub 3/H/sub 7/ reaction are fit by the modified Arrhenius expression k/sub 1/(T) = 1.04 x 10/sup -16/T/sup 1.72/ exp(-288 cal mol/sup -1//RT) cm/sup 3/ molecule/sup -1/ s/sup -1/. The reactivity of an individual methyl or methylene group in propane is found to be independent of the hydrogen isotopic content of the remaining alkyl groups in the molecule. Branching ratios for the formation of n-propyl and isopropyl radicals are presented as functions of temperature; abstraction of a secondary hydrogen atom is more important at room temperature and abstraction by OH in propane is characterized. 33 references, 4 figures, 5 tables.

• Research Organization: Sandia National Labs., Livermore, CA
• OSTI ID: 5682311
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:9; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400302 -- Organic Chemistry-- Isotope Effects-- (-1987)
ALKANES
ARRHENIUS EQUATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DEUTERIUM COMPOUNDS
ELEMENTS
EMISSION SPECTROSCOPY
EQUATIONS
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
INFORMATION
ISOTOPE EFFECTS
KINETICS
LASERS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROPANE
RADICALS
REACTION KINETICS
SPECTROSCOPY
TEMPERATURE DEPENDENCE