Aneta Ćwiklińska

Refractive properties of binary mixtures containing 2-methoxyethanol and n-butylamine, isobutylamine, sec-butylamine and tert-butylamine

Refractive index (n) and related properties such as molar refraction (R) have been investigated for 2-methoxyethanol (ME) + n-butylamine (n-BA) and 2-methoxyethanol (ME) + isobutylamine (iso-BA), 2-methoxyethanol (ME) + sec-butylamine (sec-BA) and 2-methoxyethanol (ME) + tert-butylamine (tert-BA) binary mixtures over the entire composition range, at different temperatures in the range 291.15 ≤⃒ T/K ≤⃒ 313.15. Furthermore, the excess molar refraction (RE ) and deviation from ideality refractive index (Δn) have been examined, in order to identify the presence of intermolecular complexes in these binary liquid mixtures. The results obtained have been interpreted on the basis of specific intermolecular interactions between species.

Dielectric properties of 2-methoxyethanol + isobutylamine, 2-methoxyethanol + sec-butylamine, and 2-methoxyethanol + tert-butylamine binary mixtures

Relative permittivities of numerous binary mixtures of 2-methoxyethanol (1) + isobutylamine (2), 2-methoxyethanol (1) + sec-butylamine (2), and 2-methoxyethanol (1) + tert-butylamine (2), between 291.15 and 313.15 K, are reported. These results are used to calculate deviations in the relative permittivities. The results are fitted to the Redlich–Kister polynomial equation to estimate the binary coefficients and standard errors. Furthermore, the experimental results are used to expose the nature of binary interactions in the bulk of the binary mixtures studied.

Physicochemical Properties of Acetonitrile-Butan-1-Ol and Acetonitrile-Butan-2-Ol Mixtures

Abstract The densities (d12 ) and relative permittivities (ϵ12) of liquid binary mixtures of acetonitrile-butan-l-ol and acetonitrile-butan-2-ol were measured at 288.15 K, 293.15 K, 298.15 K, 303.15 K and 308.15 K, as well as refractive indices (n D 12) at 298.15 K and surface tensions (σ12) at 293.15 K, 298.15 K and 303.15 K. From all these data, the molar volumes (V m ), apparent molar volumes (V i, φ), temperature coefficients of relative permittivities (α12) and surface tensions (k) and their deviations from ideality were calculated. Additionally, the Kirkwoods correlation factors (g K ) were found. The values of these properties are discussed in terms of interactions of acetonitrile with butan-1-ol and butan-2-ol.

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

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, j i (ACN-i-BtOH) and j i (ACN-t-BtOH) were found. The relative permittivities ( k 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 = y 12 ( t ) and y 12 = y 12 ( X 1 ) [where: y 12 = d 12 or k 12 ]. From all these data, the deviations from ideality molar volumes , temperature coefficients of relative permittivities ( f 12 ) and the excess extrathermodynamic parameters were calculated. The values of these structural parameters are discussed in terms of interactions of acetonitrile with both alcohols.

2-Metoxyethanol-Acetonitrile Binary Mixtures and Their Physicochemical Properties

Abstract Densities (d 12) and relative permittivities (\Varepsilon12) have been measured for 2-metoxyethanol (ME) and acetonitrile (ACN) binary liquid mixtures over their whole compositions ranges at various temperatures ranging from 288.15K to 308.15K. The experimental data were used to test some empirical equations of the type: y 12=y 12(t) and y 12=y 12(X 1) (where: y 12-d 12 or \Varepsilon12). From all these data, the excess molar volumes (V E m), temperature coefficients of relative permittivities (α12) and the excess extrathernmodynamic parameters \VarepsilonE were calculated. The 1H-NMR spectra of liquid binary mixtures of ME and ACN, were recorded at 298 K over almost the whole range of the mixed solvent compositions. From these data the values of the values of the spectral structural parameters were found, Δδ(ME-ACN). The values of these structural parameters are discussed in terms of interactions of 2-metoxyethanol with acetonitrile.

Studies on the intermolecular interactions in the binary mixtures of nitrobenzene with 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol and 2-butoxyethanol at T = 298.15 K

Densities, viscosities and speeds of sound, at T = 298.15 K, in the binary mixtures of nitrobenzene with 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol and 2-butoxyethanol have been measured as a function of composition. From the experimental data excess molar volumes V E, excess energies of activation for viscous flow (G* E), excess isentropic compressibility ( ) and the deviations in the viscosity (Δln η) from a mole fraction average have been calculated. The viscosity data were correlated with equations of Hind et al., Grunberg and Nissan, Frenkel, and McAllister. The results are discussed in terms of intermolecular interactions and structure of studied binary mixtures.

Volumetric and dielectric behaviour of 2-methoxyethanol-dimethylsulfoxide binary liquid mixtures

Abstract Densities (d12) and relative permittivities (ϵ12) have been measured for 2-methoxyethanol (ME) with dimethylsulfoxide (DMSO) binary liquid mixtures over the whole composition range at various temperatures ranging from 288.15K. The experimental data were used to test some empirical equations of the type: y12 = y12(t) and y12 = y12(X1) and [where: y12 − d12 or ϵ12]. From all these data, the excess molar volumes (V12E), temperature coefficients of relative permittivities (α12) and the excess extrathermodynamic parameters ϵ12E were calculated. The 1H-NMR spectra of liquid binary mixtures of ME and DMSO, were recorded at 298 K over almost the whole range of the mixed solvent compositions. From these data the values of the spectral structural parameters were found, Δδ(ME-DMSO). These structural parameters as a function of concentration suggest the formation of stable 2ME· DMSO and ME·DMSO intermolecular complexes.

Speed of sound of some aliphatic amines with 2-methoxyethanol mixtures at 298.15 K

The speed of sound of binary mixtures of 2-methoxyethanol with diethylamine, triethylamine, propylamine, dipropylamine, sec-butylamine and tert-butylamine has been measured as a function of composition at 298.15 K. From the experimental data, values of deviations in the speed of sound (Δu) and isentropic (Δκ) compressibility from ideality have been calculated. The results for Δu and Δκ are discussed on the basis of intermolecular interactions between the components of the analysed mixtures.

Studies on intermolecular interactions in binary mixtures of alkoxypropanols with ethyl tert -butyl ether at various temperatures

Densities and viscosities at T = 293.15, 298.15 and 303.15 K in the binary liquid mixtures of ethyl tert-butyl ether (ETBE) with propylene glycol monomethyl ether (PM), dipropylene glycol monomethyl ether (DPM) and tripropylene glycol monomethyl ether (TPM) have been measured over the entire mixture compositions. These data have been used to compute the excess molar volumes (V E), the excess energies of activation for viscous flow ΔG* E, the deviations in the viscosity (Δη) from a mole fraction average and the Grunberg–Nissan interaction parameters (d 12). The values of V E, Δη, ΔG* E and d 12 are negative over the entire range of composition for all the studied binary mixtures. The changes of V E, Δη, ΔG* E and d 12 with variations in the composition and the chain-length of the alkyl groups in the alkoxypropanol molecules are discussed in terms of the intermolecular interactions.

Study on intermolecular interactions in liquid acetonitrile — propan-1-ol mixtures by means of measuring their 1H-NMR spectra and analysis of their physicochemical properties

Abstract The 1H-NMR spectra of liquid binary mixtures of acetonitrile and propan-1-ol, were recorded at 298 K over almost the whole range of the mixed solvent compositions. From these data were found the values of the spectral parameter, Δδ(ACN PrOH). The densities (d12) and relative permittivities (ɛ12) of the mixed solvent were measured at 288.15 K, 293.15 K, 298.15 K, 303.15 K and 308.15 K, as well as refractive indices at 298.15 K. From all these data, the molar volumes (Vm), apparent molar volumes (V,i), partial molar volumes (Vi0), temperature coefficients of relative permittivities (α12) and their deviations from ideality were calculated. Additionally, the Kirkwoods correlation factors (gκ) were found. The values of these properties are discussed in terms of interactions of acetonitrile with propan-1-ol.