Acetonitrile - 2-Methyl-Propan-1-ol and Acetonitrile - 2-Methyl-Propan-2-ol Binary Mixtures and their Physicochemical Properties

Abstract

The 1 H-NMR spectra of liquid binary mixtures of acetonitrile with 2-methyl-propan-1-ol (i-BtOH) and 2-methyl-propan-2-ol (t-BtOH), were recorded at 298 K over almost the whole range of mixed solvent compositions. From these data the values of spectral parameters, Á(ACN-i-BtOH) and Á(ACN-t-BtOH) were found. The relative permittivities (" 12 ) and the densities (d 12 ) of the mixed solvents were measured at 288.15 K, 293.15 K, 298.15 K, 303.15 K and 308.15 K. The experimental data were used to test some empirical equations of the type: y 12 ¼ y 12 (t) and y 12 ¼ y 12 (X 1 ) [where: y 12 ¼ d 12 or " 12 ]. From all these data, the deviations from ideality molar volumes (V E 12 ), temperature coefficients of relative permittivities ( 12 ) and the excess extrathermodynamic parameters " E 12 were calculated. The values of these structural parameters are discussed in terms of interactions of acetonitrile with both alcohols.

On Intermolecular Dipolar Coupling in Two Strongly Polar Liquids: Dimethyl Sulfoxide and Acetonitrile

“…In Figure are depicted the temperature dependences of the static dielectric permittivity (ε s ) of DMSO and ACN, representing the results from Figure a (the results are in a very good agreement with the numerous published data). − The most striking is the difference in the static permittivity values of the both liquids, for example at 20 °C: ε s DMSO ≈ 48 and ε s ACN ≈ 37.5. If one takes into account that the both liquids are composed of the molecules of the same dipole moment value μ ≈ 4 D , and that the unit volume of liquid ACN contains about 25% more dipoles than DMSO (the molar volumes ratio V m ACN / V m DMSO 0.75, at 20 °C), one should expect rather higher permittivity value for ACN than for DMSO.…”

Refractive properties of binary mixtures containing 2-methoxyethanol and diethylamine, triethylamine, and propylamine

“…where is the density [6,7], n is the refractive index, and x i and M i represent the mole fraction and molar mass of component i, respectively. The values of molar refraction of the studied binary mixtures, at 298.15 K, are given in Table V.…”

“…In continuation of our program on the structural properties of some mixtures of 2-methoxyethanol with aliphatic amines [4][5][6][7][8][9], the present article reports the refractive index for 2-methoxyethanol þ diethylamine, 2-methoxyethanol þ triethylamine, and 2-methoxyethanol þ propylamine, at various temperatures.…”

Molecular Dynamics and Entropy Effects in Hydrogen-Bonded Supramolecular PolymerN,N′-Di(2-methyl-2-pentylheptyl)urea Dissolved in Nonpolar Medium

“…Temperature and concentration dependences of the static dielectric permittivity of MPHU in CCl 4 solutions. The permittivity data for acetonitrile are presented by ☆. – …”

“…The static dielectric permittivity values for neat acetonitrile are marked in Figure 6, at several temperatures. [44][45][46][47][48] As can be clearly seen in the figure, the temperature variation of ε s (T) for acetonitrile and MPHU + CCl 4 solution of x ) 0.1, two liquids of very similar static permittivity values, are essentially different. This fact reflects the difference in the thermodynamic consequences of the orientational behavior of the entities formed in these two liquids.…”