Solvents Having High Dielectric Constants. V. Limiting Ionic Equivalent Conductances in N-Methylacetamide at 40°<sup>1,2</sup>

Dawson, Lyle R.; Wilhoit, Eugene D.; Holmes, Richard R.; Sears, Paul G.

doi:10.1021/ja01569a005

Cited by 26 publications

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“…Finally, like the other two amides studied, NMA , has extensive applications as a solvent because it is effortless to prepare and purify. However, the miscibility with water at 298.15 K reaches only approximately 80%.…”

Section: Introductionmentioning

confidence: 99%

“…However, the miscibility with water at 298.15 K reaches only approximately 80%. NMA is characterized by a broad solubility and dissociating ability. , NMA is also characterized by a high dielectric constant (165.5 at 40 °C) as well as a large dipole moment. Figure shows an increase in the dielectric constant with lower density values in comparison with the other two amides studied, with a maximum up to approximately 50% and a large increase in the viscosity up to 80% of the weight of composition.…”

Section: Introductionmentioning

confidence: 99%

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Solubility of Sodium Halides in Aqueous Mixtures with ε-Increasing Cosolvents: Formamide, N-Methylformamide, and N-Methylacetamide at 298.15 K

Hernández-Luis

Rodríguez-Raposo

Galleguillos

et al. 2016

Ind. Eng. Chem. Res.

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The solubility data for sodium halides (NaF, NaCl, NaBr, and NaI) have been determined at 298.15 K in the ε-increasing mixtures of water–formamide, water–N-methylformamide, and water–N-methylacetamide. In all cases, the solubility of the electrolytes was decreased significantly in the presence of a cosolvent. The solubility of an electrolyte in a given solvent depends on both the nature of the solvent (mainly the polarity, dielectric constant, solvation, or preferential solvation if the solvent is a mixture of solvents, etc.) and the properties of the electrolyte (principally the size, the charge, and the possible association of its ions). If the molality of saturation is not sufficiently small, the ion–ion and ion–solvent interactions must be considered. Although it was not the objective of this work, the solubility values were qualitatively correlated with several properties of the solvent and solute. Finally, a simple justification, which was both qualitative and quantitative, was carried out.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solubility of Sodium Halides in Aqueous Mixtures with ε-Increasing Cosolvents: Formamide, N-Methylformamide, and N-Methylacetamide at 298.15 K

Hernández-Luis

Rodríguez-Raposo

Galleguillos

et al. 2016

Ind. Eng. Chem. Res.

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“…In the present study, aqueous NMA solution is considered due to its importance for the interpretation of the properties of peptides in aqueous solutions. NMA is highly unusual with respect to many of its physical properties and especially when water mixtures are considered. , The density of water–NMA mixtures shows a maximum and a minimum with respect to composition at 303 K, whereas the viscosity exhibits a large maximum at approximately 0.5 mol fraction at temperatures of 303–313 K which suggests a high degree of association or complex formation between the peptide dipole and water. Since water–NMA mixtures are important polar solvent media in chemistry, it is also very important to understand how the solute particles of different nature behave in these mixed solvents.…”

Section: Introductionmentioning

confidence: 99%

Effect of Water on Solvation Structure and Dynamics of Ions in the Peptide Bond Environment: Importance of Hydrogen Bonding and Dynamics of the Solvents

Pattanayak

Chowdhuri

2011

J. Phys. Chem. B

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The solvation structure and dynamics of ions in aqueous N-methylacetamide (NMA) solutions are calculated using classical molecular dynamics simulations. Our results are analyzed in terms of varying composition ranging from pure NMA to pure water. We also examined the effect of varying water content on the structure and dynamics of a neutral solute. Altogether we have simulated 38 different systems in the present work. It is found that water molecules have preference over NMA for the ions irrespective of their charge and size, whereas the neutral solute is preferably solvated by methyl groups of NMA. The calculated self-diffusion coefficient values show comparatively slower dynamics for ions than the neutral solute which can be attributed to the stronger solvation of ions in aqueous NMA mixtures. Various dynamical properties associated with translational and rotational motion of solvents are also calculated, and similar slower dynamics of solvents is observed which can be attributed to the enhanced stability of the hydrogen bonds and formation of interspecies complexes in the mixtures.

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Neuere Ergebnisse der Elektrochemie nichtwäßriger Lösungen. Über Leitfähigkeiten und Potentialeinstellungen

Fischer

Winkler

Jander

1958

Zeitschrift für Elektrochemie, Berichte der Bunsengesellschaft

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Leitfähigkeitsuntersuchungen Zur Theorie der Leitfähigkeit nichtassoziierter Elektrolyte Halbempirische Leitfähigkeitsformeln Methoden zur Bestimmung der Grenzäquivalentleitfähigkeit, des Dissoziationsgrades und der Dissoziationskonstanten assoziierender Elektrolyte Zur Theorie der Ionenassoziation Allgemeines zur Meß‐ und Experimentiertechnik Über die Bestimmung von Überführungszahlen Spezielle Ergebnisse der Untersuchungen In organischen Lösungsmitteln In anorganischen Lösungsmitteln Potentialmessungen Das Versagen von gebräuchlichen Elektrodenkombinationen in nichtwäßrigen Lösungsmitteln Messung von Normalpotentialen und Bestimmung der Aktivitätskoeffizienten Die Spannungsreihe in Wasser und in verschiedenen nichtwäßrigen Lösungsmitteln Potentiometrische Titrationen

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Solvents Having High Dielectric Constants. V. Limiting Ionic Equivalent Conductances in N-Methylacetamide at 40°^1,2

Cited by 26 publications

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Solubility of Sodium Halides in Aqueous Mixtures with ε-Increasing Cosolvents: Formamide, N-Methylformamide, and N-Methylacetamide at 298.15 K

Solubility of Sodium Halides in Aqueous Mixtures with ε-Increasing Cosolvents: Formamide, N-Methylformamide, and N-Methylacetamide at 298.15 K

Effect of Water on Solvation Structure and Dynamics of Ions in the Peptide Bond Environment: Importance of Hydrogen Bonding and Dynamics of the Solvents

Neuere Ergebnisse der Elektrochemie nichtwäßriger Lösungen. Über Leitfähigkeiten und Potentialeinstellungen

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Solvents Having High Dielectric Constants. V. Limiting Ionic Equivalent Conductances in N-Methylacetamide at 40°1,2

Cited by 26 publications

References 0 publications

Solubility of Sodium Halides in Aqueous Mixtures with ε-Increasing Cosolvents: Formamide, N-Methylformamide, and N-Methylacetamide at 298.15 K

Solubility of Sodium Halides in Aqueous Mixtures with ε-Increasing Cosolvents: Formamide, N-Methylformamide, and N-Methylacetamide at 298.15 K

Effect of Water on Solvation Structure and Dynamics of Ions in the Peptide Bond Environment: Importance of Hydrogen Bonding and Dynamics of the Solvents

Neuere Ergebnisse der Elektrochemie nichtwäßriger Lösungen. Über Leitfähigkeiten und Potentialeinstellungen

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Solvents Having High Dielectric Constants. V. Limiting Ionic Equivalent Conductances in N-Methylacetamide at 40°^1,2