Binary Liquid Mixture Of Acetonitrile Research Articles

Thermodynamic Study of Binary Liquid Mixture of Acetonitrile with Glycols and Polyglycols at 308.15 K

Thermodynamic Study of Binary Liquid Mixture of Acetonitrile with Glycols and Polyglycols at 308.15 K

Dielectric behavior of acetonitrile + methanol binary mixtures at microwave frequency

Values of dielectric constant ( '  ) and dielectric loss (  ) have been experimentally determined for binary liquid mixtures of acetonitrile + methanol at 10.75 GHz microwave frequencies at 30 0 C. The values of '  and  have been used to evaluate the loss tangent ( tan ), molar polarization (P12), apparent polarization (P2) and a.c. conductivity ( p  ). From the studied system indicates that the solute-solvent type of interaction taking place. Density, viscosity and refractive index measurement of binary liquid mixtures were carried out at 30 0 C. The values of viscosity have been used to evaluate the activation energy (Ea). The surface tension has been experimentally determined for pure liquid and binary liquid mixtures at 30 0 C.These parameters have been used to explain the formation of 1:1 complex in the system.

The structure of and interactions in binary acetonitrile + water mixtures

Binary liquid mixtures of acetonitrile (AN) and water (W) are widely used as reaction media in such fields of chemistry as physical organic chemistry, reverse phase liquid chromatography, and electrochemistry, among others. Much information on the structure of these systems and the interactions in them has accumulated since the author's often quoted comprehensive 1990 paper, so that a review is merited. Macroscopic physical properties, results from diffraction and spectroscopic studies, theoretical considerations and computer simulations, and results from the use of solute probes all bear on the structure (and less so on the dynamics) of the mixtures. These are discussed in terms of the microheterogeneity that occurs in them at intermediate contents (that leads eventually to liquid‐liquid phase separation). Copyright © 2012 John Wiley & Sons, Ltd.

Application of the Extended Langmuir Model for the Determination of Lyophobicity of 1-Propanol in Acetonitrile

Surface tensions (σ) of binary liquid mixtures of acetonitrile (ACN) with 1-propanol (PrOH) were measured over the entire composition range at eight different temperatures, 278.15 K, 283.15 K, 288.15 K, 293.15 K, 298.15 K, 303.15 K, 308.15 K, and 313.15 K. The lyophobicities (β) of the surfactant PrOH relative to that of ACN as well as the surface mole fractions (\({x^{\rm S}_{2}}\)) of PrOH at various temperatures were derived using the extended Langmuir model (Langmuir 17, 4261, 2001). The β values indicate the greater affinity of PrOH for the surface, and this trend slightly increases with rising temperature. The determined \({x^{\rm S}_{2 }}\) values indicate that the surface concentration of PrOH is always higher than its bulk concentration and consequently confirm that the surface is enriched with PrOH.

Ultrasonic and Volumetric Studies of Molecular Interactions in Acetonitrile + 1‐Alkanol (C6, C8, C10) Binary Liquid Mixtures at Different Temperatures

AbstractThe densities, ρ, and ultrasonic speeds, u, have been measured in the binary liquid mixtures of acetonitrile (ACN) with 1‐hexanol, 1‐octanol and 1‐decanol, and in the pure components, as a function of composition at 25, 30, 35, 40 and 45 °C. The deviations in isentropic compressibility, Δκs, excess molar volume, VE, deviations in ultrasonic speed, Δu, apparent molar compressibility, Kϕ2, apparent molar volume, Vϕ2, partial molar compressibility,\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm \bar K}^\circ _{\phi,2} $\end{document}, and partial molar volume,\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm \bar V}^\circ _2 $\end{document}, of 1‐alkanols in ACN have been calculated from the experimental data of densities and ultrasonic speeds. The variations of these parameters with composition of the mixtures indicate that the structure‐breaking effect dominates over that of the hydrogen‐bonding effect between unlike molecules, suggesting that ACN‐alkanol interaction is weaker than ACN‐ACN and alkanol‐alkanol interactions, and that the interaction (ACN‐alkanol) follows the order: 1‐hexanol > 1‐octanol > 1‐decanol. The excess molar volume data have been analysed by using Flory and Prigogine‐Flory‐Patterson theories. Further, the ultrasonic speeds in these mixtures were theoretically calculated with the help of several theories and empirical relations using the pure component data. The validity and relative merits of these theories and relations have been discussed.

Kerr effect studies in acetonitrile-aromatic hydrocarbon systems

We report our experimental observations of the variation of Kerr constant in five binary liquid mixtures of acetonitrile in benzene, toluene, nitrobenzene, chlorobenzene and o-nitrotoluene with different molar fractions. The observed non-additive nature of Kerr constant with molar fraction is found in good agreement with the mean-field theory, that predicts the exact additivity when there is a matching of refractive index, dielectric constant and molar volume between the components of the binary liquid mixture.

Binary liquid mixtures of acetonitrile with methyl, ethyl, n-propyl and n-butyl benzoates. Variation of viscosities with temperature and composition

Viscosity values of the binary mixtures: (I) acetomtrile + methylbenzoate: (II) acetonitrile + ethyl benzoate; (III) acetonitrile + n-propyl benzoate and (IV) acetonitrile + n-butyl benzoate at 10, 20, 30, 40 and 50 °C have been measured. Several equations for the variation of viscosity with temperature and composition of the mixtures are proposed; the effect of chain length of the esters has also been studied.

Viscosity and densities of binary mixtures of acetonitrile with substituted anilines. Part 4

Viscosity and density data are presented for five binary liquid mixtures of acetonitrile with aniline and substituted anilines at five different temperatures. The experimental data are fitted to semitheoretical equations proposed by McAllister and Heric. Excess viscosity, excess volume and the excess Gibbs energy of activation of flow have been calculated from the experimental data. Various thermodynamic parameters of activation of flow are calculated from the dependence of viscosity on temperature. The deviations from ideality of thermodynamic and transport functions are explained on the basis of molecular interactions between the components of the mixture.