The Dielectric Relaxation of 3-Bromomethylpentane

The dielectric premittivity of supercooled 3-bromomethylpentane in the temperature range of 145 K down to 114 K is reported here. Data were obtained by steady-state ac bridge measurements in the frequency range from 105 Hz down to 20 mHz and by transient measurements for relaxation times from 2 up to 2500s. With exception of the high-frequency data, the data are described by the skewed are relaxation function, and the relaxation parameter ß is seen to approach 0.50 at the lowest temperature. The temperature dependence of the relaxation times can be represented by the empirical expression of Vogel with T∞ = 87.6 K.