POLYMORPHISMS OF IS(4-METHOXYPHENYL)-2-(3-NITROPHENYL)-1H-IMIDAZOLE AS STUDIED BY SOLID-STATE NMR

Solid state NMR measurements are carried out for polymorph and inclusi on complexes of s(4-methoxyphenyl)-2-(3-nitrophenyl)-1H-imidazole. Obs erved C-13 and N-15 chemical shifts are characteristic of each polymor ph A, B, C and D. In addition, N-15 chemical shift was a good index fo r understanding hydrogen bond. VT measurements revealed that B transfo rms to C between 93 and 113 degrees C. From PSTMAS and H-1 solid echo measurements for AcOET inclusion complex, host molecules have almost s ame structure as B and guest molecules have the highest mobility of al l inclusion complexes.