8-Aminoquinolinium Chloride Dihydrate

The title compound, C₉H₉N₂⁺.Cl⁻.2H₂O, crystallized from water as pale orange plates. The structure reveals strong hydrogen bonding between one of the water molecules and both the quinolinium [N—H...O 2.691 (4) Å] and amino [N—H...O 2.967 (4) Å] H atoms. The second water molecule is hydrogen bonded to the first [O—H...O 2.658 (3) Å], and weakly to two different chloride ions. The overall packing results in stacks of quinolinium ions, with adjacent molecules having opposite orientations.

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