Crystal structure of 5-(2 '-aminophenyl)-2-dimethylamino-1,3,4-thiadiazole

The crystal structure of 5-(2'-Aminophenyl)-2-dimethylamino-1,3,4-thiazole is determined by X-ray diffraction. The compound is prepared by an unusual recyclization of 3-N,N-dimethylthioureidoquinazolin-4(3H)-one. The crystal is monoclinic, space group P2(1)/c, a = 7.420(2) Angstrom, b = 10.466(5) An gstrom, c = 14.752(9) Angstrom, beta = 109.2(4)degrees, rho(calcd) = 1.359 g/cm(3), and Z = 4 for the C10H12N4S composition. The molecule consists of the thiadiazole and phenyl rings and the dimethylamine N(CH3)(2) and amine NH2 groups attached to the rings. The molecule as a whole is planar The dih edral angle between the rings is 8.9 degrees. The N(1) and N(4) atoms in th e molecule are bound through the intramolecular interaction (2.76 Angstrom) . Molecules, which are linked in pairs by antiparallel hydrogen bonds, form a framework structure. (C) 2000 MAIK "Nauka/Interperiodica".