Complex formation between erythritol and 4-hexylresorcinol

The interaction between erythritol and 4-hexylresorcinol during heating was investigated by thermal analysis, powder X-ray diffractometry and infrared spectroscopy. A phase diagram was constructed by measuring the thermal beh aviour of various resolidified physical mixtures of erythritol and 4-hexylr esorcinol. The phase diagram revealed complex formation between erythritol and 4-hexylresorcinol with incongruent melting at 84 degrees C; the stoichi ometry was a molar raio of 1:2 erythritol:4-hexylresorcinol. The complex ga ve diffraction peaks at 2 theta=5.6 degrees and 11.2 degrees in the X-ray p owder diffraction pattern. In the infrared spectrum, a new peak due to the complex was observed at 3504 cm(-1). The complex prepared by grinding and e vaporation had the same molecular arrangement as the complex prepared by se aled heating.