Thermal decomposition of methyl phenyl ether in shock waves: The kinetics of phenoxy radical reactions

Chin Yu Lin, Ming-Chang Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

132 Scopus citations

Abstract

The unimolecular decomposition of methyl phenyl ether (anisole) was studied in incident shock waves covering the temperature range from 1000 to 1580 K and the pressure range from 0.4 to 0.9 atm. The CO formed in the reaction, monitored by resonance absorption using a stabilized CW CO laser, could be satisfactorily accounted for by a four-reaction mechanism: C6H5OCH3 → C6H5O + CH3 (1), C6H5O → CO + C5H5 (2), CH3 + C6H5O → o- and p-CH3C6H4OH (3), and CH3 + CH3 → C2H6 (4). Kinetic modeling of observed CO production profiles based on the above mechanism with 70 sets of data led to k1 ≃ (1.2 ± 0.3) × 1016 exp(-33 100/T) s-1, k2 = 1011.40±0.20 exp(-22 100 ± 450/T) s-1, and k3 = (5.5 ± 2.0) × 1011 cm3·mol-1·s-1. The relatively low A factor and activation energy measured for the phenoxy radical decomposition reaction support the mechanism A involving a tight intermediate.

Original languageEnglish
Pages (from-to)425-431
Number of pages7
JournalJournal of physical chemistry
Volume90
Issue number3
DOIs
StatePublished - 1 Jan 1986

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