Phase Transition of 1,16-Hexadecanediol

It was found that 1,16-hexadecanediol exhibited a solid-solid phase transition. X-ray diffraction experiments and dielectric constant measurements were carried out in order to investigate the structure of the high-temperature phase. A model of molecular arrangement in the high-temperature phase was presented. The high-dielectric constant values were observed in the high-temperature phase. It is considered that the high-temperature phase of 1,16-hexadecanediol is a rotator phase in analogy with n-higher alcohols.