Journal ArticleDOI
Studies on the dissociation constants of 1,10-phenanthroline in ethanediol + water mixtures at 25°C
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TLDR
In this paper, the thermodynamic dissociation constants for the isoelectric reaction LH + ⇌ L + H + (where L = 1,10-phenanthroline) were determined pH-metrically and spectrophotometrically in ethanediol + water mixtures (0-100%).About:
This article is published in Thermochimica Acta.The article was published on 1989-04-15. It has received 5 citations till now. The article focuses on the topics: Aqueous solution.read more
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Comparison of the Macroscopic Molecular Properties in Understanding the Structural Aspects of Mixed Aquo–Organic Binary Mixtures
TL;DR: A comparison of macroscopic and microscopic methods for the determination of structural aspects of solvent systems is presented in this article, where a comparison of the macro-scopic method and microscopic method are compared.
Journal ArticleDOI
Medium effects on the acid dissociation constants of some diimine heterocyclic bases
Abstract: The acid dissociation constants of the protonated form of diimine heterocyclic compounds (imidazole, 2-methylimidazole, 2,2′-bipyridyl, and 1,10-phenanthroline) were determinedpH-meterically in aqueous media containing different amounts of organic solvents, viz. amphiprotic (methanol, ethanol), dipolar aportic (DMSO), and low basic aprotic (acetonitrile) at 25±0.1 °C. It was observed that by increasing the amount of alcohol orDMSO in the aqueous medium thepKa, values of the investigated compounds decreased. On the other hand, thepKa values increased as the amount of acetonitrile in the medium was increased. These results are discussed in terms of various solvent characteristics. It is concluded that solvent effects, viz. differences in stabilization of the free base by dispersion forces and of the proton by its interaction with solvent molecules in amphiprotic or dipolar aprotic solvent-aqueous media relative to that in pure aqueous one, as well as the basicity effect of acetonitrile play a vital role in the ionisation equilibria of the investigated compounds.
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Gibbs Energies of Transfer of Hydrogen Ion from Water to Tetrahydrofuran + Water Mixtures and Basicity and Structuredness of Aquo-ethers
TL;DR: In this paper, the Gibbs energies of transfer of H+ ion from water to tetrahydrofuran-water mixtures have been calculated in terms of ion-solvent interactions, structural variations and basicity of aquo-organic mixtures.
Journal ArticleDOI
Studies on Thermodynamic Dissociation Constants of 2,2′-Bipyridine and 1,10-Phenanthroline in Acetonitrile + Water Mixtures and Gibbs Energy of Transfer of Hydrogen Ions from Water to Acetonitrile + Water Mixtures
TL;DR: In this paper, the Gibbs energies of transfer of H + ions from water to acetonitrile + water mixtures from which structural variations and solvent basicity of aquo-organic mixtures were determined.
Journal ArticleDOI
Ion-solvent interactions and determination of single-ion Gibbs energies of transfer from the studies of the solubility and dissociation constants of oxalic acid in aquo + methanolic mixtures
S. K. Gumtya,S. C. Lahiri +1 more
TL;DR: In this paper, the solvent effects on the dissociation of the simplest dibasic organic acid were examined from the determination of the first and second dissociation constants of oxalic acid conductometrically and pH-metrically in water+ methanol mixtures (0-87 wt % of methanoline).
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Determination of pH: theory and practice.
TL;DR: In this article, a book to wait for in this month is given, and even if you have wanted for long time for releasing this book determination of ph theory and practice; you may not be able to get in some stress.
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