Tautomeric and Microscopic Protonation Equilibria of Anthranilic Acid and Its Derivatives
نویسندگان
چکیده
منابع مشابه
Tautomeric and Microscopic Protonation Equilibria of Anthranilic Acid and Its Derivatives
The acid-base chemistry of three zwitterionic compounds, namely anthranilic (2-aminobenzoic acid), N-methylanthranilic and N-phenylanthranilic acid has been characterized in terms of the macroconstants Ka1, Ka2, the isoelectric point pHI, the tautomerization constant Kz and microconstants k11, k12, k21, k22. The potentiometric titration method was used to determine the macrodissociation constan...
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Surfactant molecules are used as interesting tools to study the structure, function and stability of proteins. Protonation states of amino acids may be changed in the presence of surfactants. In this work, using experimental observations and molecular dynamic simulation, the effects of sodium dodecyl sulfate on the acid dissociation constants of tryptophan was examined. The acid–base equilibriu...
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Amide-iminol tautomerism was studied for ionized oxamic acid (OA+•) in the gas phase using theDFT method with the UB3LYP functional and various basis sets {6-31++G(d,p), 6-311+G(d,p), and augcc-pVDZ}. Among twenty tautomers-rotamers possible for OA+•, eleven isomers were found to bethermodynamically stable. Similarly as for the neutral molecule, ionization (OA → OA+• + e) favors theamidization ...
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15 صفحه اولSolvent Effects on Tautomeric and Microscopic Protonation Constants of Glycine in Different Aqueous Solutions of 1,4-Dioxane
The acid-base equilibria of glycine have been studied in different aqueous solutions of 1,4-dioxane(0-50 % by v/v) using potentiometric method. In this study, the macro and micro protonationconstants of the amino acid and its tautomeric constant have been determined at 25 °C and constantionic strength 0.1 mol dm-3 (NaCl). The protonation and the tautomeric constants of glycine indifferent binar...
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ژورنال
عنوان ژورنال: Journal of Solution Chemistry
سال: 2014
ISSN: 0095-9782,1572-8927
DOI: 10.1007/s10953-014-0190-3