Acta Cryst. (2006). E62, o4786-o4788  [ doi:10.1107/S1600536806039444 ]

2-[(4-Carboxycyclohexyl)methylammoniomethyl]-6-hydroxyphenolate

S. Shuja, S. Ali, N. Khalid, G. Labat and H. Stoeckli-Evans

Abstract: The title Schiff base, C₁₅H₁₉NO₄, crystallizes with two molecules per asymmetric unit. In the solid state, a zwitterion is observed, with a strong intramolecular N-HO hydrogen bond involving the NH imine H atom and the phenolate O atom. In the crystal structure, the two crystallographically independent molecules are linked by O-HO hydrogen bonds to create centrosymmetric dimers. These dimers are connected by intermolecular C-HO hydrogen bonds to form layers.

Online 4 October 2006

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