Acta Cryst. (2007). E63, o3701  [ doi:10.1107/S1600536807037397 ]

N-[2-(4-Hydroxybenzylideneamino)ethyl]-N-[2-(4-oxidobenzylideneamino)ethyl]ammonium

X.-M. Tian, G. Liu, Y. Feng and J.-D. Wang

Abstract: The title Schiff base compound, C₁₈H₂₁N₃O₂, was synthesized by a condensation reaction of 4-hydroxybenzaldehyde with diethylenetriamine. The crystal structure determination reveals that one of the terminal hydroxy groups is deprotonated while the imino group of the molecule is protonated; thus the compound is a zwitterion. The two terminal benzene rings are nearly parallel to one another, with a dihedral angle of 9.94 (6)°. Intermolecular O-HO and N-HO hydrogen bonding helps to stabilize the crystal structure.

Online 3 August 2007

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