Abstract
In the title compound, C8H7N3O2 center dot H2O, the 2-methyl-5-nitro-1H-benzimidazole molecule, excluding the methyl H atoms, is approximately planar, with a maximum deviation of 0.137 (1) A. The crystal structure is stabilized by water molecules via N-H...O(water), O(water)-H...O and O(water)-H...N hydrogen bonds, forming sheets parallel to the (100) plane. A short intermolecular contact between the benzene and imidazole rings, with a centroid-centroid distance of 3.6419 (10) A, indicates a pi-pi interaction.