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Mechanism of elimination of amino acid derivatives in the gas phase. Pyrolysis kinetics of ethyl picolinate, ethyl 1-methylpipecolinate and picolinic acid by Jennifer Lafont; Adolfo Ensuncho; Rosa M. Domínguez; Alexandra Rotinov; Armando Herize; Jairo Quijano; Gabriel Chuchani is a Chemistry article available to read on EtoBox.
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## Abstract The kinetics of the gas‐phase elimination of the title compounds were determined in a static reaction system over the temperature range 180.8–419.4 °C and the pressure range 15–86 Torr (1 Torr = 133.3 Pa). The reactions are homogeneous and unimolecular and obey a first‐order rate law. The observed rate coefficients are represented by the following Arrhenius equations: for ethyl picolinate, log[__k__~1~(s^−1^)] = (11.30 ± 0.24) −(180.9 ±3.0) kJ mol^−1^ (2.303 __RT__)^−1^, for ethyl 1‐methylpipecolinate, log[__k__~1~(s^−1^)] = (13.36 ± 0.31) −(209.5 ± 3.9) kJ mol^−1^ (2.303 __RT__)^−1^ and for picolinic acid, log[__k__~1~(s^−1^)] = (12.05 ± 0.10) −(135.7 ± 0.9) kJ mol^−1^ (2.303 __RT__)^−1^. The data from this work together with those reported in the literature confirm previous considerations that amino acids or α‐nitrogen substituents of carboxylic acids undergo an extremely rapid decarboxylation process. The pyrolysis kinetics of picolinic acid, which is an intermediate of ethyl picolinate elimination, showed a dramatic fast decomposition into pyridine and CO~2~ gas. The decarboxylation process of α‐amino or α‐nitrogen substituents of carboxylic acids differs from the
Who reads Mechanism of elimination of amino acid derivatives in the gas phase. Pyrolysis kinetics of ethyl picolinate, ethyl 1-methylpipecolinate and picolinic acid?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Jennifer Lafont; Adolfo Ensuncho; Rosa M. Domínguez; Alexandra Rotinov; Armando Herize; Jairo Quijano; Gabriel Chuchani
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0894-3230)
- Published
- 2002
- Language
- EN
- Field
- Chemistry (Physical Sciences)