The anomalous relation of dielectric parameters to temperature for liquid nitrobenzene

Dielectric parameters are reported for pure nitrobenzene and dilute solutions in the microwave and radio-frequency ranges, together with the refractive index as a function of temperature at 6–45 °C. The dielectric parameters show marked anomalies at 11.28 and 34 °C on account of changes in the configuration of molecular assemblies. The most probable relaxation time is found to be 2.3 · 10^–11 sec and the critical wavelength 4.3 cm, the dielectric loss ⁿ then being maximal.