APPARENT AND PARTIAL MOLAR VOLUMES OF SOME SYMMETRICAL TETRAALKYLAMMONIUM PERCHLORATES IN 2-METHOXYETHANOL AT 25-DEGREES-C, 35-DEGREES-C, AND 45-DEGREES-C

The apparent and partial molar volumes (phi(v)) of six symmetrical tet raalkylammonium perchlorates (Me(4)NClO(4) to Hex(4)NClO(4)) have been determined in 2-methoxyethanol at 25, 35, and 45 degrees C. The appar ent molar volumes were extrapolated to zero concentration to obtain li miting values at infinite dilution. Ionic limiting partial molar volum es have been estimated using the extrapolation method. The analysis of the data shows that the tetraalkylammonium ions are scarcely solvated and that strong ion-ion interaction exists between the oppositely cha rged ions in this medium. The temperature dependence of the limiting p artial molar volumes have been explained on the basis of ion-solvent i nteractions.