Partial molar volumes (phi(0)(V)) and viscosity B-coefficients of salicylaldehyde anil zinc (II), abbreviated as SAZ, in (0.00, 0.02, 0.04 and 0.05) mol . dm(-3) tetrabutylammonium bromide (Bu4NBr) solutions in methanol (MeOH) were determined from solution density and viscosity measurements at (298.15, 308.15 and 318.15) K under ambient pressure. Apparent molar volumes (phi(V)) and solution densities (rho) were further used to determine isobaric apparent molar expansibilities (phi(E)), isobaric partial molar expansibilities (phi(0)(E)) and temperature dependence of isobaric partial molar expansibilities (phi(0)(E)) at constant pressure, (partial derivative phi(0)(E)/partial derivative T)(p) of SAZ solutions to study the nature of different interactions in the ternary solutions. The transition state theory was applied to analyze the viscosity B-coefficients of the ternary solutions on the basis of the activation parameters of viscous flow. The overall results indicated strong solute-solvent interactions between SAZ and the solvent mixture and SAZ acts as a net structure breaker in the ternary solutions. UV-Visible absorption spectra of the ternary solutions also stand in support of the results obtained. (c) 2013 Elsevier Ltd. All rights reserved.