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The title mol­ecule, C 13 H 8 N 4 , is is essentially planar [r.m.s. deviation for all non-H atoms = 0.025 (3) Å]. In the crystal, mol­ecules are connected through one weak bifurcated N—H⋯(N,N) hydrogen bond and three π–π stacking inter­actions between pyridine and imidazole rings [centroid–centroid distance = 3.631 (8) Å] and between pyridine and benzene rings [centroid–centroid distances = 3.675 (5) and 3.666 (2) Å].

5H-Imidazo[4,5-f][1,10]phenanthroline