Determination of D[C6F5CH2—Br] by the toluene carrier method

Autor:	R. John Kominar, Michael J. Krech, Stanley James W. Price
Rok vydání:	1980
Předmět:	chemistry.chemical_compound Reaction rate constant Chemistry Organic Chemistry Analytical chemistry General Chemistry Atmospheric temperature range Pyrolysis Toluene Catalysis
Zdroj:	Canadian Journal of Chemistry. 58:1906-1908
ISSN:	1480-3291 0008-4042
DOI:	10.1139/v80-303
Popis:	The pyrolysis of C6F5CH2Br has been studied by the toluene carrier technique over the temperature range 727–800 °C. Rate constants are based on analysis for residual parent compound by gas chromatography using an internal standard technique. In selected runs a material balance of 100 ± 2% was obtained for bromine based on C6F5CH2Br plus HBr. Within the limits of the experimental technique the process appears to be first order and homogeneous. In addition to HBr the other major products of the thermal decomposition are C6F5CH3, (C6F5CH2)2, C6F5CH2CH2C6H5, and (C6H5CH2)2. The Arrhenius equation obtained is[Formula: see text]The log A value is very close to the value of 14.6 recommended by Benson and O'Neal for the decomposition of C6H5CH2Br. The activation energy, 225 ± 6 kJ mol−1, should be a reasonable estimate of D[C6F5CH2—Br].
Databáze:	OpenAIRE
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