Static permittivity (ε0m) and permittivity at optical frequency (ε∞m) of the binary mixtures of 3-bromoanisole (3-BA) and 1-propanol (1-PrOH) at different concentrations were measured at four different temperatures (303.15 K, 313.15 K, 323.15 K, and 333.15 K). The static permittivity (ε 0m ) was measured by using precision LCR meter at 2 MHz frequency. The permittivity at optical frequency (ε ∞m ) was taken as square of refractive index, which was measured using Abbe’s refractometer. The excess dielectric parameters, Kirkwood correlation factors, and Bruggeman factor were evaluated. The excess parameters were fitted to the Redlich–Kister equation. The Kirkwood effective correlation factor of 3-BA is smaller than that of 1-PrOH at all temperatures. The Bruggeman plot shows a deviation from linearity. The determined parameters have been interpreted in terms of molecular interaction between the molecular species of the binary mixtures.

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