Bubble point temperatures at 94.83 kPa, over the entire composition range, are measured for the binary mixtures of acetonitrile with: n-, iso-, Yec- and teri-butanols - using a Swietoslawski type ebulliometer. The liquid phase composition versits bubble point temperature measurements are found to be well represented by the Wilson model. Measured values of the liquid phase mole fraction versits bubble point temperature data are presented along with the computed values of the vapor phase mole fractions. activity coefficients and excess Gibbs free energies and discussed. (c) 2006 Elsevier Ltd. All rights reserved.