4,9-Dihydroxy-4,9-dimethyl-4H,9H-1,2,5,6,6a,7,8-heptahydroimidazo[1,2,3-i,j][1,8]naphthyridinium Benzoate

The crystal structure of the title compound, C₁₂H₂₁N₂O₂⁺.C₇H₅O₂⁻, consists of an imidazo[1,2,3 − i,j][1,8]naphthyridinium cation and a benzoate anion, which are held together by two strong O-H...O hydrogen bonds with O...O non-bonded contact distances of 2.642 (2) and 2.681 (2) Å, respectively. In the tricyclic cation, the imidazoline ring is almost planar, while the two six-membered rings are twisted and adopt deformed half-chair conformations. The benzoate anion is not perfectly planar, with the negative charge delocalized over the carboxylate group.

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