2-[2-(1H-Imidazol-3-ium-5-yl)eth­yl]-3-(pyridin-2-yl)-2H-imidazo[1,5-a]pyridin-4-ium bis­(perchlorate)

In the title mol­ecular salt, C(17)H(17)N(5) (+)·2ClO(4) (−), the dihedral angles between the fused-ring system and the pendant five- and six-membered heterocyclic rings are 6.4 (2) and 41.29 (19)°, respectively. The O atoms of both perchlorate anions are disordered over two sets of sites with occupancy ratios of 0.614 (8):0.386 (8) and 0.591 (7):0.409 (7). An intra­molecular C—H⋯N contact occurs in the cation. In the crystal, the components are linked by N—H⋯O and C—H⋯O hydrogen bonds and π–π stacking inter­actions [centroid–centroid separation = 3.642 (3) Å].