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Gas phase elimination kinetics of α-bromo-o-toluic acid. Participation of the COOH group

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Abstract

The elimination kinetics of α-bromo-o-toluic acid have been studied over the temperature range of 623.3–673.6 K and pressure range of 22–43 Torr. The reaction products are phthalide and HBr gas. The rate coefficient for the homogeneous unimolecular elimination is expressed by the following equation: log k1 (s−1)=(11.69±0.13)−(182.1±1.6)kJ mol−1(2.303RT)−1. The formation of phthalide product suggests participation of the carbonyl oxygen of the COOH group. The present result provides additional evidence of an intimate ion pair mechanism in the gas phase pyrolysis of some type of haloacids in the gas phase.

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Authors and Affiliations

  1. Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), Apartado 21827, 1020-A, Caracas, Venezuela

    Gabriel Chuchani & Rosa M. Domínguez

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  1. Gabriel Chuchani
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  2. Rosa M. Domínguez
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Chuchani, G., Domínguez, R.M. Gas phase elimination kinetics of α-bromo-o-toluic acid. Participation of the COOH group. React Kinet Catal Lett 59, 53–58 (1996). https://doi.org/10.1007/BF02067992

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  • DOI: https://doi.org/10.1007/BF02067992

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