Kinetic and Mechanistic Studies on the Reaction of DL-Methionine with in Aqueous Medium at Physiological pH

Autor:	A. K. Datta, Tandra Das, Alak K. Ghosh
Rok vydání:	2009
Předmět:	Chemistry Ligand Mechanism (philosophy) General Engineering Outer sphere electron transfer General Earth and Planetary Sciences Physical chemistry Limiting Kinetic energy DL-methionine Equilibrium constant General Environmental Science
Zdroj:	Research Letters in Inorganic Chemistry. 2009:1-5
ISSN:	1687-6814 1687-6806
Popis:	The reaction has been studied spectrophotometrically; the reaction shows two steps, both of which are dependent on ligand concentration and show a limiting nature. An associative interchange mechanism is proposed. Kinetic and activation parameters (k1∼10−3s−1 and k2∼10−5s−1) and (ΔH≠1=13.8±1.3kJmol−1, ΔS≠1=−250±4JK−1mol−1, ΔH≠2=55.53±1.5kJmol−1, and ΔS≠2=−143±5JK−1mol−1) have been calculated. From the temperature dependence of the outer sphere association equilibrium constant, thermodynamic parameters (ΔH∘1=16.6±2.3kJmol−1 and ΔS∘1=95±7JK−1mol−1; ΔH∘2=29.4±3.2kJmol−1 and ΔS∘2=128±10JK−1mol−1) have also been calculated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2c07100deae039804ffcdfd9ded3513a https://doi.org/10.1155/2009/314672 Zobrazit plný text záznamu Plný text ve formátu PDF