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Densities, ρ, viscosities, η, speeds of sound, u, and refractive indices, n D , of binary liquid mixtures of 1-decanol with o-chlorotoluene, m-chlorotoluene, and p-chlorotoluene have been measured over the entire range of composition at 298.15 K, 303.15 K, and 308.15 K and at atmospheric pressure. From the experimental data of density, speed of sound, viscosity and refractive index, the values of the excess molar volume, V E , deviations in isentropic compressibility, κ S , and deviations in molar refraction, R, have been calculated. The calculated excess and deviation functions have been analyzed in terms of molecular interactions and structural effects.

Densities and speeds of sound of binary liquid mixtures of {nonan-1-ol and decan-1-ol + 1,2-dimethylbenzene, or 1,3-dimethylbenzene, or 1,4-dimethylbenzene, or ethylbenzene} were measured over the entire composition range at (293.15, 303.15, and 313.15) K and at a pressure of 0.1 MPa. The experimental densities and speeds of sound were used to obtain the excess molar volumes and the isentropic compressibilities of the binary liquid mixtures. The Redlich−Kister polynomial was fitted to the excess molar volumes to derive the binary coefficients and the standard errors between the experimental and the calculated quantities. The excess molar volumes are positive for the binary liquid mixtures of {nonan-1-ol and decan-1-ol + ethylbenzene} over the entire composition range at (293.15 to 313.15) K. For the binary liquid mixtures of {nonan-1-ol + 1,2-dimethylbenzene, or 1,3-dimethylbenzene, or 1,4-dimethylbenzene}, the excess molar volumes show sigmoid trend, and the values vary from negative to positive over the whole composition range, except for the binary liquid mixtures of (nonan-1-ol + 1,2-dimethylbenzene) at (303.15 and 313.15) K where the excess molar volumes are positive over the whole composition range. For the binary liquid mixtures of {decan-1-ol + 1,2-dimethylbenzene, or 1,3-dimethylbenzene}, the excess molar volumes show slightly s-shaped trend at (293.15 and 303.15) K, but the excess molar volumes are positive over the whole composition range at T = 313.15 K for these binary liquid mixtures. For the binary liquid mixtures of {decan-1-ol + 1,4-dimethylbenzene), the excess molar volumes show sigmoid trend over the whole composition range at (293.15 to 313.15) K. As we go from nonan-1-ol to decan-1-ol and increase the temperature from (293.15 to 313.15) K, the excess molar volumes become more positive for all the binary liquids mixtures which indicate weak intermolecular interactions between (nonan-1-ol and decan-1-ol + aromatic hydrocarbon) at higher temperatures.

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Densities, speeds of sound, and refractive indices of binary mixtures of decan-1-ol with 2-methylphenol (o-cresol), 3-methylphenol (m-cresol), 4-methylphenol (p-cresol), and methyl phenyl ether (anisole) were measured over the entire range of composition from T = (298.15 to 308.15) K and at a pressure of 0.1 MPa. The experimental values of densities were used to calculate the excess molar volumes of the binary liquid mixtures. Excess molar volumes have been fitted to the Redlich-Kister polynomial equation to derive the binary coefficients and the standard errors between the experimental and the calculated quantities. The excess molar volumes are negative over the entire composition range for the binary mixtures of decan-1-ol with m-cresol and p-cresol and give an s-shaped curve with o-cresol at the high mole fraction region of o-cresol. For the binary mixtures of decan-1-ol with anisole, the excess molar volume is positive.