In the title comound, C8H8N4S, one of the two independent molecules is essentially planar (r.m.s. deviation = 0.025 A ° ), while the other is slightly buckled (r.m.s. deviation = 0.131 A ° ) with the guanidine unit bent out of the plane of the fused-ring system by 16.8 (1). In the crystal, intermolecular N—H N hydrogen bonds between the ... إقراء المزيد

2-Guanidinobenzimidazole condenses with benzaldehyde in the presence of hydrochloric acid to form 2-amino-3,4- dihydro-4-phenyl-1,3,5-triazino[1,2-a]benzimidazole, which was isolated as its hydrochloride, C15H14N5 +Cl. The positive charge of the cation is formally placed on the double-bonded N atom of the dihydrotriazine ring. The six-membered dihydrotriazine that is fused with the benzimidazole ring system is relatively flat (r.m.s. deviation = 0.106 A ° ... إقراء المزيد