Influence of solvent environment on dielectric behaviour of ethylene oxidecondensation products

Dielectric behaviour of four series of ethylene oxide condensation products , i.e. monoalkyl ethers of ethylene,glycol, monoalkyl ethers of diethylene glycol, dialkyl ethers of ethylene glycol and dialkyl ethers of diethylene glycol have been carried out in dilute solutions of carbon tetrachloride at 35 degrees C. Molar polarization and Kirkwood correlation factor have been determined for the molecules of these series as a function of mole fractio n of solute using 1 MHz static dielectric constant and dielectric constant at optical frequency. It is inferred that the extensive inter and intra mol ecular hydrogen bonding exists in the molecules of monoalkyl ethers of ethy lene glycol and of diethylene glycol in dilute solutions of carbon tetrachl oride. Average relaxation time, relaxation time corresponding to overall ro tation and group rotations have been calculated by measuring the complex pe rmittivity in dilute solutions of carbon tetrachloride at 9.83 GHz. A compa rison has been made with the dielectric relaxation processes of these molec ules in dilute solutions of benzene and in their pure liquid state which we re carried out earlier in this laboratory. The influence of hydrogen bondin g, the effect of chain length and solvents environment on these relaxation times has been discussed. A distinction between the various relaxation time s of different homologous Series have been clearly made out.