2-(6-Phenyl-7H-1,2,4-triazolo[3,4-b][1,3,4]thia­diazin-3-yl)-1,3-benzothia­zole

In the title compound, C(17)H(11)N(5)S(2), the dihedral angles formed between the triazole ring and the benzene ring and the 1,3-benzothia­zole ring system are 8.67 (8) and 13.90 (9)°, respectively. The conformation of the triazolo-thia­diazin-3-yl fused ring system is a twisted half-chair. Overall, the mol­ecule adopts a flattened shape. Supra­molecular helical chains along the a axis sustained by C—H⋯N inter­actions are found in the crystal structure. These are linked via C—H⋯π contacts as well as π–π [centroid–centroid distance = 3.5911 (12) Å] inter­actions between the triazole and thia­zole rings.