N-(3-Methyl­phen­yl)quinoxalin-2-amine monohydrate

The quinoxaline system in the title hydrate, C(15)H(13)N(3)·H(2)O, is roughly planar, the r.m.s. deviation for the 18 non-H atoms being 0.188 Å; this conformation features a short intra­molecular C—H⋯N(pyrazine) inter­action. In the crystal, the amine H atom forms an N—H⋯O hydrogen bond to the water mol­ecule, which in turn forms two O—H⋯N hydrogen bonds to the pyrazine N atoms of different organic mol­ecules. These inter­actions lead to supra­molecular arrays in the bc plane that are two mol­ecules thick; additional π–π inter­actions stabilize the layers [ring centroid–centroid distance = 3.5923 (7) Å]. The layers stack along the a-axis direction via C—H⋯π contacts.