Excess molar volumes of N,N-dimethylformamide+2-pentanone+alkan-1-ols mixed solvent systems at 303.15K

Densities of binary mixtures of 2-methoxyethanol (2-MeO-EtOH) and 2-ethoxyethanol (2-EtO-EtOH) with hexylamine (HLA), diethylamine (DEA), triethylamine (TEA), tert-butylamine (TBA), aniline (ANL), and benzylamine (BLA) have been determined at varying compositions of the alkoxyalkanols at 298.15 K. The excess molar volumes, VE, of the binary mixtures were calculated from the experimental density data of the mixtures and the component single solvents. The calculated excess molar volumes were fitted into the Redlich-Kister polynomial to obtain the fitting coefficients and standard deviations. The excess molar volumes of the binary mixtures of all the solvent systems investigated were negative over the entire range of the solvents composition. The negative values were attributed to stronger hydrogen bond formations between the unlike molecules of mixtures than those between the like molecules of the pure components. The magnitude of the excess molar volumes of the binary mixtures of 2-methoxyethanol and the aliphatic amines were in the order TBA > TEA > DEA > HEA. For the two aromatic amines, the magnitudes were in the order BLA > ANL. For binary mixtures of the amines and 2-ethoxyethanol, the magnitudes were in the order DEA > TEA > TBA > HEA at compositions where the mole fraction of 2-EtO-EtOH was ≤0.5 and TBA > TEA > DEA > HEA above 0.5 mole fraction of 2-EtO-EtOH.

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Excess volumes and refractive indices in the benzene-tert-amyl methyl ether and cyclohexane-tert-amyl methyl ether systems at 298.15 K

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19872839 ◽

1987 ◽

Vol 52 (12) ◽

pp. 2839-2843 ◽

Cited By ~ 18

Author(s):

Jan Linek

Keyword(s):

Methyl Ether ◽

Excess Molar Volumes ◽

Excess Volumes ◽

Refractive Indices ◽

Molar Volumes ◽

Vibrating Tube Densimeter ◽

Ether System

Excess molar volumes in the benzene-tert-amyl methyl ether and cyclohexane-tert-amyl methyl ether systems were measured by a vibrating-tube densimeter at 298.15 K and compared with the data for the methanol-tert-amyl methyl ether system determined previously. Besides, the refractive indices in both the systems were measured at the same temperature.

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Excess molar volumes of binary mixtures of acetic acid and propionic acid with some members of homologous series of alkanes

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19910736 ◽

1991 ◽

Vol 56 (4) ◽

pp. 736-744 ◽

Cited By ~ 11

Author(s):

Ondřej Drábek ◽

Ivan Cibulka

Keyword(s):

Acetic Acid ◽

Propionic Acid ◽

Alkyl Chain ◽

Excess Molar Volumes ◽

Liquid Mixtures ◽

Entire Concentration Range ◽

Molar Volumes ◽

Binary Liquid ◽

Alkane Molecule ◽

Increasing Temperature

Excess molar volumes of binary liquid mixtures of (acetic or propionic acid = hexane) at 25 and 35°C, and (acetic or propionic acid + heptane or octane) and (acetic acid + dodecane) at 25°C, measured with a tilting dilution dilatometer, are reported. The excess volumes are positive over the entire concentration range for all mixtures and increase with increasing length of an alkane molecule, decrease with increasing of the alkyl chain in a molecule of carboxylic acid, and increase with increasing temperature.

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