The gas-phase elimination kinetics of ethyl 2-furoate and ethyl 2-thiophenecarboxylate

The gas‐phase elimination kinetics of ethyl 2‐furoate and 2‐ethyl 2‐thiophenecarboxylate was carried out in a static reaction system over the temperature range of 623.15–683.15 K (350–410°C) and pressure range of 30–113 Torr. The reactions proved to be homogeneous, unimolecular, and obey a first‐ord...

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Published in:International journal of chemical kinetics 2009-03, Vol.41 (3), p.145-152
Main Authors: Espitia, Liliany, Meneses, Ruby, Dominguez, Rosa M., Tosta, Maria, Herize, Armando, Lezama, Jesus, Lafont, Jennifer, Chuchani, Gabriel
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container_issue 3
container_start_page 145
container_title International journal of chemical kinetics
container_volume 41
creator Espitia, Liliany
Meneses, Ruby
Dominguez, Rosa M.
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Lezama, Jesus
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Chuchani, Gabriel
description The gas‐phase elimination kinetics of ethyl 2‐furoate and 2‐ethyl 2‐thiophenecarboxylate was carried out in a static reaction system over the temperature range of 623.15–683.15 K (350–410°C) and pressure range of 30–113 Torr. The reactions proved to be homogeneous, unimolecular, and obey a first‐order rate law. The rate coefficients are expressed by the following Arrhenius equations: ethyl 2‐furoate, log k1 (s−1) = (11.51 ± 0.17)–(185.6 ± 2.2) kJ mol−1 (2.303 RT)−1; ethyl 2‐thiophenecarboxylate, log k1 (s−1) = (11.59 ± 0.19)–(183.8 ± 2.4) kJ mol−1 (2.303 RT)−1. The elimination products are ethylene and the corresponding heteroaromatic 2‐carboxylic acid. However, as the reaction temperature increases, the intermediate heteroaromatic carboxylic acid products slowly decarboxylate to give the corresponding heteroaromatic furan and thiophene, respectively. The mechanisms of these reactions are suggested and described. © 2008 Wiley Periodicals, Inc. Int J Chem Kinet 41: 145–152, 2009
doi_str_mv 10.1002/kin.20382
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title The gas-phase elimination kinetics of ethyl 2-furoate and ethyl 2-thiophenecarboxylate
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