✦ LIBER ✦

The mechanism in the elimination kinetics of 2-chloropropionic acid in the gas phase

✍ Scribed by Gabriel Chuchani; Alexandra Rotinov

Publisher: John Wiley and Sons
Year: 1989
Tongue: English
Weight: 233 KB
Volume: 21
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550210507

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✦ Synopsis

The elimination kinetics of 2-chloropropionic acid have been studied over the temperature range of 320-370.2"C and pressure range of 79-218.5 torr. The reaction in seasoned vessel and in the presence of the free radical suppressor cyclohexene, is homogeneous, unimolecular, and obeys a first-order rate law. The dehydrochlorination products are acetaldehyde and carbon monoxide. The rate coefficient is expressed by the following Arrhenius equation: log k , ( s -' ) = (12.53 2 0.43) -(186.9 t 5.l)kJ mol-'

(2.303RT)-'. The hydrogen atom of the carboxylic COOH appears to assist readily the leaving chloride ion in the transition state, suggesting an intimate ion pair mechanism operating in this reaction.

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