| abstract |
Provided is a more stable crystal polymorphism of an inclusion compound composed of 1,1,2,2-tetrakis(4-hydroxyphenyl)ethane and 2-phenyl-4-methyl-5-hydroxymethylimidazole (molar ratio 1:2). A novel crystal polymorphism of an inclusion compound, which is composed of 1,1,2,2-tetrakis(4-hydroxyphenyl)ethane and 2-phenyl-4-methyl-5-hydroxymethylimidazole (molar ratio 1:2) and has diffraction peaks at diffraction angles (2[Theta]) of 11.20 DEG, 13.36 DEG, 14.36 DEG, 18.16 DEG, 19.20 DEG, 19.68 DEG, 20.84 DEG, 21.48 DEG, 22.56 DEG, 23.76 DEG and 24.08 DEG in a powder X-ray diffraction pattern as measured using an CuK[alpha] ray, can be produced by, for example, producing a crystal of the inclusion compound by a conventionally known method and then further recrystallizing the crystal. |