2-(Pyridin-4-yl)-1H-benzimidazole.

The title compound, C12H9N3, is an unhydrated analogue of the previously reported trihydrate. The mol­ecule is essentially planar, with a 3.62 (11)° angle between the pyridine and benzimidazole planes. In the crystal, N—H⋯N hydrogen bonds result in chains of mol­ecules parallel to [010], which are additionally linked by weak π–π stacking inter­actions [centroid–centroid distance = 3.7469 (17) A], resulting in extended sheets of molecules parallel to (103).