Volumetric and viscometric properties of aqueous solutions of N-(2-hydroxyethyl)morpholine at T=(293.15, 303.15, 313.15, 323.15, 333.15)K

a b s t r a c tDensities (q) and viscosities (g) of binary mixtures containing the Protic Ionic Liquid (PIL), pyrrolidinium octanoate with five molecular solvents: water, methanol, ethanol, n-butanol, and acetonitrile are determined at the atmospheric pressure as a function of the temperature and within the whole composition range. The refractive index of all mixtures (n D ) is measured at 298.15 K. The excess molar volumes V E and deviation from additivity rules of viscosities g E and refractive index D / n, of pyrrolidinium octanoate solutions were then deduced from the experimental results as well as apparent molar volumes V/ i , partial molar volumes V m;i and thermal expansion coefficients a p . The excess molar volumes V E are negative over the entire mole fraction range for mixture with water, acetonitrile, and methanol indicating strong hydrogen-bonding interaction for the entire mole fraction. In the case of longest carbon chain alcohols (such as ethanol and n-butanol) + pyrrolidinium octanoate solutions, the V E variation as a function of the composition describes an S shape. The deviation from additivity rules of viscosities is negative over the entire composition range for the acetonitrile, methanol, ethanol, and butanol, and becomes less negative with increasing temperature. Whereas, g E of the {[Pyrr][C 7 CO 2 ] + water} binary mixtures is positive in the whole mole fraction range and decreases with increasing temperature. the excess Gibbs free energies of activation of viscous flow (DG* E ) for these systems were calculated. The deviation from additivity rules of refractive index D / n are positive over the whole composition range and approach a maximum of 0.25 in PIL mole fraction for all systems. The magnitude of deviation for D / n describes the following order: water > methanol > acetonitrile > ethanol. Results have been discussed in terms of molecular interactions and molecular structures in these binary mixtures.

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“…(10): with increasing temperature. This behaviour is habitually observed for compounds containing ammonium function in mixture with water [78].…”

Section: Viscosities Of {[Pyrr][c 7 Co 2 ] + Solvent} Binary Mixturesmentioning

confidence: 67%

Volumetric properties, viscosity and refractive index of the protic ionic liquid, pyrrolidinium octanoate, in molecular solvents

Anouti

Vigeant

Jacquemin

et al. 2010

The Journal of Chemical Thermodynamics

140

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“…In the present study the viscosity coefficients have been transformed into their decimal logarithm and entered into the group-additivity calculation as log(η). The main sources of experimental viscosity data have been the collective papers of Suzuki et al [5,7] and Katritzky et al [6], supplemented by more recently published experimental results for alkanes [11,12,13,14], haloalkanes [15,16], alkanols [17,18,19,20], alkylamines [21,22,23,24], aminoalcohols [25,26,27], ethers [28,29], aminoethers [30], acetals [31], ketones [32], esters [33,34,35,36,37,38,39,40,41,42,43], hydroxyesters [44,45], carbonate esters [46], and amides [47,48,49,50,51,52]. Beyond these, experimental data have been added for compounds with atom groups that have not yet been represented in the parameters table: phosphoric acid esters [53,54,55], phosphoric acid amides [56], siloxanes [57] and in particular ionic liquids [32,58,59,60,61,62,…”

Section: Resultsmentioning

confidence: 99%

Application of a General Computer Algorithm Based on the Group-Additivity Method for the Calculation of Two Molecular Descriptors at Both Ends of Dilution: Liquid Viscosity and Activity Coefficient in Water at Infinite Dilution

Naef

Acree

2017

Molecules

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The application of a commonly used computer algorithm based on the group-additivity method for the calculation of the liquid viscosity coefficient at 293.15 K and the activity coefficient at infinite dilution in water at 298.15 K of organic molecules is presented. The method is based on the complete breakdown of the molecules into their constituting atoms, further subdividing them by their immediate neighborhood. A fast Gauss–Seidel fitting method using experimental data from literature is applied for the calculation of the atom groups’ contributions. Plausibility tests have been carried out on each of the calculations using a ten-fold cross-validation procedure which confirms the excellent predictive quality of the method. The goodness of fit (Q2) and the standard deviation (σ) of the cross-validation calculations for the viscosity coefficient, expressed as log(η), was 0.9728 and 0.11, respectively, for 413 test molecules, and for the activity coefficient log(γ)∞ the corresponding values were 0.9736 and 0.31, respectively, for 621 test compounds. The present approach has proven its versatility in that it enabled the simultaneous evaluation of the liquid viscosity of normal organic compounds as well as of ionic liquids.

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“…As part of our experimental investigation of the thermophysical properties of liquid mixtures with morpholine derivatives as one of the components [1][2][3][4][5], we present here the experimental data on density for (N-acetylmorpholine + benzene, +toluene, +ethylben-zene, and +mesitylene) binary mixtures over the whole composition range and at temperatures from (293.15 to 343.15) K and atmospheric pressure. A detailed search in the literature shows that very few measurements have been made on the densities for binary mixtures containing N-acetylmorpholine as one component.…”

Section: Introductionmentioning

confidence: 99%

Densities and volumetric properties of (N-acetylmorpholine+aromatic hydrocarbon) binary mixtures from T=(293.15 to 343.15)K

Abu‐Daabes

Awwad

Al-Ani

2009

The Journal of Chemical Thermodynamics

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Volumetric and viscometric properties of aqueous solutions of N-(2-hydroxyethyl)morpholine at T=(293.15, 303.15, 313.15, 323.15, 333.15)K

Cited by 11 publications

References 10 publications

Volumetric properties, viscosity and refractive index of the protic ionic liquid, pyrrolidinium octanoate, in molecular solvents

Volumetric properties, viscosity and refractive index of the protic ionic liquid, pyrrolidinium octanoate, in molecular solvents

Application of a General Computer Algorithm Based on the Group-Additivity Method for the Calculation of Two Molecular Descriptors at Both Ends of Dilution: Liquid Viscosity and Activity Coefficient in Water at Infinite Dilution

Densities and volumetric properties of (N-acetylmorpholine+aromatic hydrocarbon) binary mixtures from T=(293.15 to 343.15)K

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