3-[(2-Aminoethyl)iminomethyl]-4-hydroxybenzoic Acid 0.28-Hydrate

The title compound crystallizes as a hydrated zwitterion with the site for the water molecule only partially occupied [site-occupancy factor 0.28 (1)] and a formula of C₁₀H₁₂N₂O₃.0.28H₂O. The hydroxyl H atom forms an intramolecular hydrogen bond to the imine N atom. The NH₃⁺ and COO^- groups of the zwitterion form a two-dimensional hydrogen-bond network that runs parallel to the ac plane. The water molecule forms hydrogen bonds to a hydroxyl O atom and a carboxylate O atom of adjacent molecules.

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