Acoustic and volumetric effects of self-association of 2-methyl-1-propanol in binary liquid mixtures at 293.15 K

Densities, Excess Molar Volumes, Ultrasonic Speeds, and Isentropic Compressibilities of Hexan-1-ol with 1,2-Dichloroethane, 1,2-Dibromoethane, and 1,1,2,2-Tetrachloroethene at (293.15 and 298.15) K

“…The corresponding excess molar isentropic compressibilities, κ E S,m , were obtained from the relation [36],…”

Acoustic and Thermophysical Properties of Binary Liquid Mixtures of Primary Butanols with Hexane and Cyclohexane at 293.15 K

“…We report the results of ultrasonic and volumetric investigations of self-association of 1-butanol in binary mixtures with hexane and cyclohexane in the whole concentration range at 293.15 K, together with similar results of 2-methyl-1-propanol binaries with hexane and cyclohexane partially presented in [1]. In the four binary liquid mixtures, the relationships among the speed of ultrasound, free intermolecular lengths, available volume, and Beyer's nonlinearity parameter B/A were compared and discussed in terms of the space-filling ability and other factors that affect structural changes in non-polar solvents and self-association in primary butanols.…”

“…For the investigated systems it was found that self-association between alcohol molecules decreases with increasing concentration of the non-polar solvent (gradual breakage of alcohol multimers and structural rearrangement of non-polar solvent connected with solvation processes) [1,2]. Furthermore, non-polar components of the binaries under test (cyclohexane and hexane) undisputably show different compressibilities and space filling abilities in the pure liquid state [1,5].…”

“…Furthermore, non-polar components of the binaries under test (cyclohexane and hexane) undisputably show different compressibilities and space filling abilities in the pure liquid state [1,5]. Therefore, mixing primary butanols with cyclic and linear hydrocarbons does not proceed isochorically and is accompanied by different volume effects.…”

“…Self-association between alcohol molecules decreases with increasing concentration of the non-polar solvent while displacement of solvate equilibrium is generally determined by physical properties of a hydrocarbon solvent and the selfassociation potential of aliphatic alcohols [1,2]. The speed of ultrasound, like any other physicochemical property in binary liquid mixtures, could be related either to size and shape of the molecules [3,4] or to the entropy effect connected with mixing processes (because of the volume and space-filling effects) [5].…”