Study of interaction through dielectrics: Behavior of − OH group molecules from 10 MHz to 20 GHz

► The complex permittivity spectra for tert-butyl alcohol (TB) with 2-propanol (2P) were determined over the frequency range of 10 MHz to 20 GHz using time domain reflectometry (TDR) in the temperature range 25 °C to 55 °C for 11 different concentrations of the system. ► The static dielectric constant (ε0) and relaxation time (τ) have been determined these spectra using the Debye model. ► We report the dielectric study of tert-butyl alcohol (TB) with 2-propanol (2P) mixture. Both are having − OH group, but at different position resulting different types of hydrogen bonded interaction. Hydrogen bonded interaction in TB is expected to be more than corresponding effect in 2P.