Crystal structure of 3-[2-(1,3-thia­zol-2-yl)diazen-1-yl]pyridine-2,6-di­amine monohydrate

In the title hydrated azo compound, C(8)H(8)N(6)S·H(2)O, the two aromatic groups are close to coplanar with the dihedral angle between the mean planes of the thia­zole and pyridine rings being 2.9 (2)°. The organic mol­ecule adopts an E configuration with respect to the double bond of the azo bridge. In the crystal, mol­ecules are linked by (amine)N—H⋯N(pyridine), (amine)N—H⋯O(water) and (water)O—H⋯N(thia­zole) hydrogen bonds along with π–π inter­actions involving pairs of thia­zole rings and pairs of pyridine rings. The plane-to-plane distance between two parallel mol­ecules is 3.7856 (4) Å and corresponds to the length of the a axis. In this way, a layer structure parallel to (010) is formed. The layers are linked by weak C—H⋯S hydrogen bonds, eventually resulting in a three-dimensional network.