Ultrasonic speeds, u and viscosities, eta of pure aniline, 1-propanol, 2-propanol, 2-methyl- 1-propanol, 2-methyl-2-propanol, and their binary mixtures with aniline as common component, over the entire composition range were measured at the temperatures 293.15, 298.15, 303.15, 308.15, 313.15 and 318.15 K. From the experimental data, the deviations in isentropic compressibility, Delta k(s), and in viscosity, Delta eta were calculated. The partial molar compressibilities, (K) over bar (m.1) and (K) over bar (m.2) of aniline and alkanols in the mixtures over the whole composition range and (K) over bar (o)(m.1) and (K) over bar (o)(m.2) at infinite dilution and excess partial molar compressibilities, (K) over bar (E)(m.1) and (K) over bar (E)(m.2), over the whole composition range and (K) over bar (oE)(m.1) and (K) over bar (oE)(m.1) at infinite dilution were calculated by using two different approaches. The variation of these parameters with composition and temperature of the mixtures has been discussed in terms of molecular interaction in these mixtures. It is observed that aniline-alkanol interaction in these mixtures follows the order: 1-propanol<2-propanol<2-methyl-l-propanol<2-methyl-2-propanol, and Delta k(s) values depend upon the number and position of hydroxyl and alkyl groups in these alkanol molecules. Furthermore, the free energies, Delta G*, enthalpies, Delta H* and entropies, Delta S* of activation of viscous flow have also been obtained by using Eyring viscosity equation and their dependence on composition of the mixtures have been discussed. (C) 2007 Elsevier B.V. All rights reserved..