Abstract
It has been clarified that oleamide exhibits four crystalline phase A,B,C and D. A melt crystallized sample showed a reversible solid-state phase transition from A to B at 0℃ and that from D to C at 10℃ on heating. Vibrational spectral data suggested a selective conformational disordering took place in the methyl-sided chain on the latter phase transition. The B and C forms transform gradually to the D form, which is stable below about 45℃.
