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Title of Journal: J Solution Chem

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Abbravation: Journal of Solution Chemistry

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Springer US

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DOI

10.1002/macp.1981.021820233

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ISSN

1572-8927

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Solvent Effects on the Protonation Constants of So

Authors: Alev Doğan Nazife Aslan Esin Canel Esma Kılıç
Publish Date: 2010/11/20
Volume: 39, Issue: 11, Pages: 1589-1596
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Abstract

The stoichiometric protonation constants of some αamino acid esters glycine methyl ester glycine tbutyl ester lvaline methyl ester lvaline ethyl ester lvaline tbutyl ester lserine methyl ester lserine ethyl ester lleucine methyl ester lleucine ethyl ester lleucine tbutyl ester lalanine methyl ester lalanine benzyl ester lphenylalanine methyl ester lphenylalanine ethyl ester and lphenylalanine tbutyl ester in water and 20 40 and 60 v/v 14dioxane–water mixtures have been determined at an ionic strength of 010 mol⋅L−1 NaCl and at 250±01 °C under a nitrogen atmosphere A potentiometric method was used and the calculation of the protonation constants has been carried out using the BEST computer program The results were discussed in terms of macroscopic properties of the mixed solvent The stoichiometric protonation constants were influenced by changes in solvent composition and their variations were discussed in terms of preferential solvation Also knowledge the protonation constant of αamino acid esters will be helpful when determining the microscopic equilibrium constants of their corresponding amino acids

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  1. Ab Initio Molecular Dynamics Simulation of Infrared Absorption Spectra of H 3 O + and H 5 O 2 + in Nonaqueous Solutions of Trifluoromethanesulfonic Acid Hydrates
  2. Modified Screen-Printed Electrode for Potentiometric Determination of Copper(II) in Water Samples
  3. Inclusion Complexes of Cyclodextrins with Galangin: a Thermodynamic and Reactivity Study
  4. Determination of Activation Energy for the Diffusion of Fe 3+ Ions in Agar Gel Medium Containing Various Transition Metal Sulfates
  5. NMR Study of the Exchange Kinetics of 30-Crown-10 Complexes with Sr 2+ and Ba 2+ Cations and Crystal Structure of the 30-Crown-10 Complex with Barium Perchlorate
  6. A Study of the Excess Properties of Aliphatic Chlorinated Compounds with Benzylalcohol at Various Temperatures
  7. Liquid–Liquid Equilibria of the Methanol + Toluene + Methylcyclohexane Ternary System at 278.15, 283.15, 288.15, 293.15, 298.15 and 303.15 K
  8. Complexation of Am(III) and Nd(III) by 1,10-Phenanthroline-2,9-Dicarboxylic Acid
  9. Diffusion Coefficients for the Ternary System Water + Chloroform + Acetic Acid at 25 °C
  10. Binding Mechanism of Bioactive Cetirizine Hydrochloride to Sudlow’s Site I of Serum Albumins
  11. Electroluminescent Properties of LECs Based on Ionic Transition Metal Complexes Using Tetrazole-Based Ancillary Ligand
  12. High-Pressure Densities and Derived Volumetric Properties (Excess, Apparent and Partial Molar Volumes) of Binary Mixtures of Methanol + [BMIM][PF 6 ]
  13. Lanthanide Complexes with Allyl Acetoacetate in Mixed Water–Organic Media: Formation, Stability and Bonding
  14. A Study on Host–Guest Complexation of 5-Amino-2-Mercaptobenzimidazole with β -Cyclodextrin
  15. The Mixing Enthalpy Interaction Coefficients of N , N ′-Hexamethylenebisacetamide with l -Alanine and l -Serine in Aqueous Glucose Solutions at 298.15 K
  16. Effect of Temperature on Salt–Salt Aqueous Biphasic Systems: Manifestations of Upper Critical Solution Temperature
  17. Studies on Intermolecular Interactions in Liquid Mixtures of Alkoxyalkanols and Branched Alcohols by Volumetric and Acoustic Measurements at Different Temperatures
  18. Li + Transport Mechanism in Oligo(Ethylene Oxide)s Compared to Carbonates
  19. Thermodynamics of concentrated electrolyte mixtures. I. Activity coefficients in aqueous NaCl−CaCl 2 at 25°C
  20. Study of the Association Behavior Between Bromophenol Blue and Octylphenol Polyoxyethylene Ether (10) in Aqueous Solution and the Solubilization of Bromophenol Blue by Micelles
  21. Kinetics and Mechanism of the Reactions Between Triphenylphosphine, Dialkyl Acetylenedicarboxilates and a NH-Acid, Pyrazole, by UV Spectrophotometry
  22. Isopiestic Determination of the Osmotic and Activity Coefficients of Li 2 SO 4 (aq) at T =298.15 and 323.15 K, and Representation with an Extended Ion-Interaction (Pitzer) Model
  23. Volumetric and Transport Properties of Ternary Mixtures Containing 1-Butanol or 1-Pentanol, Triethylamine and Cyclohexane at 303.15 K: Experimental Data, Correlation and Prediction by the ERAS Model
  24. First Hydrolysis Constant of Lutetium (III) by Solvent Extraction
  25. Volumetric Properties of the Nucleoside Thymidine in Aqueous Solution at T = 298.15 K and p = (10 to 100) MPa
  26. Spinodal Composition of the System Water + Chloroform + Acetic Acid at 25 °C
  27. Complexation Studies of Pyridyl Sulfonamide Ligands for Sensing Zinc and Copper Ions
  28. A Thermodynamic Study on the Binding of Cobalt(II) and Iron(III) Ions with Bovine Carbonic Anhydrase II at Different Temperatures
  29. Solubility of Omeprazole Sulfide in Different Solvents at the Range of 280.35–319.65 K
  30. Chemical Equilibria Modeling of Calcium Phosphate Precipitation and Transformation in Simulated Physiological Solutions
  31. Isopiestic Determination of the Osmotic and Activity Coefficients of the { y Na 2 HPO 4 + (1 −  y )K 2 HPO 4 }(aq) System at T = 298.15 K
  32. Ionic Strength Effect on the Stability of the V(V) + IDA Complex
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  34. Kinetics and Mechanism for Hydrolysis of α -Amino Acid Esters in Mixed Ligand Complexes with Zn(II)–Nitrilo-tris(methyl phosphonic Acid)
  35. The Oxidation of Iron(II) with Oxygen in NaCl Brines
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