Formation of D and H atoms in the pyrolysis of benzene-d/sub 6/ and chlorobenzene behind shock waves
From the measurements of H atoms during pyrolysis of chlorobenzene under similar conditions at 1570-1790K, the first-order rate constant for the dissociation of chlorobenzene to chlorine atoms and phenyl radicals was found to be about an order of magnitude greater than that for the pyrolysis of C/sub 6/D/sub 6/, and a rate constant still another order of magnitude greater was noted for the dissociation of phenyl radicals to H atoms and other products. From this information, a rate constant was derived for the dissociation of benzene-d/sub 6/ to phenyl-d/sub 5/ and D atoms. The rate constant for the H-D exchange reaction on benzene was determined over the temperature range of 300-1400K by combining results of this work with that of others at lower temperatures. A very simple kinetic model based on a reaction chain with H as carrier can relate the data presented from this work to other shock-tube work at higher benzene concentrations.
- Research Organization:
- Wright State Univ., Dayton, OH
- DOE Contract Number:
- AC02-76ER02944
- OSTI ID:
- 5700816
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:24; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400302 -- Organic Chemistry-- Isotope Effects-- (-1987)
AROMATICS
ARYL RADICALS
BENZENE
CHEMICAL REACTIONS
CHLORINATED AROMATIC HYDROCARBONS
DATA
DECOMPOSITION
DEUTERIUM
DISSOCIATION
ELEMENTS
EXPERIMENTAL DATA
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
HYDROGEN
HYDROGEN ISOTOPES
INFORMATION
ISOTOPE APPLICATIONS
ISOTOPES
ISOTOPIC EXCHANGE
LABELLED COMPOUNDS
LIGHT NUCLEI
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHENYL RADICALS
PYROLYSIS
RADICALS
SHOCK TUBES
STABLE ISOTOPES
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
TRACER TECHNIQUES