Crystal structure and Hirshfeld surface analysis of 3,6-bis­(pyrimidin-2-yl)-1,4-di­hydro-1,2,4,5-tetra­zine dihydrate

In the title compound, C(10)H(8)N(8)·2H(2)O or H(2)bmtz·2H(2)O [bmtz = 3,6-bis­(2′-pyrimid­yl)-1,2,4,5-tetra­zine], the asymmetric unit consists of one-half mol­ecule of H(2)bmtz and one water mol­ecule, the whole H(2)bmtz mol­ecule being generated by a crystallographic twofold rotation axis passing through the middle point of the 1,4-di­hydro-1,2,4,5-tetra­zine moiety. In the crystal, N—H⋯O, N—H⋯N, O—H⋯O hydrogen bonds and aromatic π–π stacking inter­actions link the components into a three-dimensional supra­molecular network. Hirshfeld surface analysis was used to further investigate the inter­molecular inter­actions in the crystal structure.