Abstract: Phase transition temperatures of stationary liquid and molar solution entropy as wb as solution enthalpy of three dichloro -benzene isomers and three chlorochlorotoluene isomers in four polysiloxane liquid crystal stationary phases (PLC-1, PLC-2,PLC-3, PLC-4) are deternined by capillary gas-liquid chromatograhy.The results are interpreted and analysed in terms of the interaction and configuration of the solute molecule.