The complex permittivity spectra of Ketones like, Dimethylketone (DMK), Ethylmethylketone (EMK) and Diethylketone (DEK) with 2–Methoxyethanol (2–ME) and 2–Butoxyethanol (2–BE) were taken using Time Domain Reflectometry Technique in the frequency range of 10 MHz to 30 GHz at 25°C. The static dielectric constant (ε0) and relaxation time (τ) for all the selected concentrations were obtained by using least square fit method. Using these parameters, the values of Bruggeman factor (fB), excess static permittivity (εE) and excess inverse relaxation time (1/τ)E were also calculated. The Bruggeman plot shows a deviation from linearity. This deviation was attributed to some sort of molecular interaction, which may take place between the unlike molecules. The effective Kirkwood correlation factor (geff) and corrective Kirkwood correlation factor (gf) of the mixtures have been determined and discussed to yield information on the structure and dynamics of the mixtures. It confirms that there is a structural formation due to intermolecular interaction between Ketones with 2–ME and 2–BE. The long range and short range interaction between the dipoles can be studied from the thermodynamic parameter, excess Helmholtz free energy (ΔFE).
