Isobaric vapour + liquid equilibria (VLE) have been experimentally determined for the binary systems (2-propanol + dimethyl carbonate (DMC)), dimethyl carbonate + 2-butanol, and methylcyclohexane + diethyl carbonate (DEC) at 101.3 kPa. The activity coefficients were calculated to be thermodynamically consistent and were correlated with the Wilson, NRTL, and UNIQUAC equations. ASOG and UNIFAC group contribution methods will be employed to predict these binary systems. Densities at T = (293.15, 298.15, 303.15, 308.15, and 313.15) K and atmospheric pressure have been measured over the whole composition range for (DEC + methylcyclohexane). Excess molar volumes have been calculated for each temperatures. A polynomial equation has been used to estimate the binary fitting parameters as a function of mole fraction and temperature. Standard deviations from the regression lines are shown for the binary mixture. (C) 2004 Elsevier Ltd. All rights reserved.