Vapor-liquid equilibrium (VLE) at P = 50 and 100 kPa data for binary systems,(Z,E-2-methyl-2-butenenitrile + R,S-4-vinyl-1-cyclohexene) and system (Z,E-2-methyl-2-butenenitrile + Z,E-3-pentenenitrile) was determined. All experimental VLE data were tested by the point test and were proven to be thermodynamically consistent. Activity coefficient correlation models (Wilson and NRTL models) were used to calculate all VLE experimental data. The model parameters were obtained by correlating the experimental data. The VLE data calculated from parameters were consistent with the experimental values.