同分异构体对苯和丁醇的偶极相互作用的影响

Sound velocity, density, and viscosity values were measured at 303 K in four binary systems of benzene ＋1-, 2-, tert-, or iso-butanol. From these data, acoustical parameters, such as adiabatic compressibility, free length, free volume, and internal pressure were estimated using the standard relations. The results are interpreted in terms of molecular interaction between the components of the mixtures. Observed excess value in all the mixture indicates that the molecular symmetry existing in the system is highly disturbed by the nonpolar benzene molecules. Interaction energy terms of the statistical mixing are also verified for these binary systems and the dipole-dipole interactions are found to be predominantly present and are sharply affected by the isomeric forms of butanol.     

Effect of Chain Length on the Dipolar Interaction of Morpholine with Primary Alkanols

Sound velocity, density, and viscosity values have been measured at T = 303 K for four binary systems of morpholine + methanol, ethanol, 1-propanol, and 1-butanol. From these data, acoustical parameters, such as adiabatic compressibility, free length, free volume, and internal pressure, have been estimated using the standard relations. The results are interpreted in terms of the molecular interaction between the components of the mixtures. The observed excess values in all the mixtures indicate that the molecular symmetry existing in the system is highly disturbed by the addition of morpholine molecules. The interaction energy terms of the statistical mixing are also verified for these binary systems, and the dipole-dipole interactions are found to be predominant and are greatly affected by the chain length of the primary alkanols.