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Complex dielectric spectra ε * (ω) = ε − iε of binary mixture of 2-methoxyethanol with nitrobenzene were obtained in the frequency range of 10 MHz to 20 GHz over the volume fraction range 0 < v < 1 and at different temperatures of 288, 298, 308, and 318 K using the time domain reflectometry (TDR) technique. The static dielectric constant εs and relaxation time τ have been obtained. These values are used to obtain the excess permittivity ε E s , excess inverse relaxation time (1/τ ) E , Kirkwood correlation factor g eff , Bruggeman factor fB, and thermodynamic parameters. On the basis of above parameters, intermolecular interaction and dynamics of molecules at molecular level are predicated.

The dielectric relaxation studies of a liquid and liquid mixture provides valuable information about intermolecular interaction along with dynamics at molecular levels. In Nitrobenzene (NB) and Chlorobenzene (CB) molecules the charge distribution is shielded and H-bonds do not appear and where as in 2-Methoxyethanol (2-ME) molecules the charge distribution is exposed. In pure Nitrobenzene and Chlorobenzene spatial correlation between molecules appear only through dipole-dipole interactions. An exposed distribution of charges, lead to very strong intermolecular interaction, however, in shielded distribution relative contribution to neighbor molecules is absent and weak intermolecular interaction is expected in liquid mixtures. To study these aspects the Time domain Reflectometry technique has been used to obtain complex dielectric spectra of binary mixture of 2-ME with NB and CB in the frequency range of 10 MHz to 10 GHz at various temperatures the results are presented and discussed.

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