2-Aminoperimidinium Bromide Dihydrate

The title compound, C₁₁H₁₀N₃⁺.Br^-.2H₂O, is essentially planar along the aminoperimidine skeleton, with an r.m.s. deviation of 0.009 Å and a maximum deviation of 0.017 Å. Due to the presence of two water molecules, extensive hydrogen bonding exists in the crystal. Hydrogen bonds via the two water molecules join the Br^- ion to both the amine N atom and one of the ring N atoms. The other ring N atom and the amine N atom also form hydrogen bonds to the Br^- ion from the second molecule in the unit cell.

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