4-[3-(phenoxymethyl)-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazin-6-yl] -3-(p-tolyl)sydnone

Abstract

In the title triazolothiadiazine derivative, C20H 16N6O3S {systematic name: 3-(4-methylphenyl)-4- [3-(phenoxymethyl)-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazin-6-yl]-1,2, 3-oxadiazol-3-ium-5-olate}, an S(6) ring motif is generated by an intra-molecular C - H⋯O hydrogen bond. The 3,6-dihydro-1,3,4-thiadiazine ring adopts a twist-boat conformation. The dihedral angle between the 1,2,3-oxadiazole and 1,2,4-triazole rings is 46.45 (14)°. The 1,2,3-oxadiazole ring is inclined at dihedral angle of 59.49 (13)° with respect to the benzene ring attached to it. In the crystal structure, inter-molecular C - H⋯O and C - H⋯N hydrogen bonds link neighbouring mol-ecules into two-mol-ecule-thick arrays parallel to the bc plane. A short S⋯O inter-action [2.9565 (19) Å] also occurs.