DIELECTRIC-RELAXATION OF BENZOPHENONE AND SOME OF ITS DERIVATIVES IN THE LIQUID-STATE .2. BENZOPHENONE, 2,4-DIHYDROXYBENZOPHENONE AND P-ROSOLIC ACID IN DMSO OR ACETONE SOLUTION

The dynamic dielectric properties of the solutions have been measured between 20 MHz and 36 GHz at 20 degree C. In addition to spectral components due to the relaxation of solute and solvent as found in similar manner for other binary polar-polar systems, a low frequency feature is observed which is weak for benzophenone but intense for both the derivatives. It can be ascribed to solvent molecules forming a loose solvation shell, where their tumbling motion is slowed down.