Acta Cryst. (2005). E61, o192-o194  [ doi:10.1107/S1600536804033616 ]

1-[(2-Carboxy-1-phenylethyl)iminiomethylene]naphth-2-olate

S. Gao, L.-H. Huo, H. Zhao and S. W. Ng

Abstract: 2-Hydroxy-1-naphthaldehyde condenses with -phenylalanine to form the Schiff base N-(2-hydroxy-1-naphthalidene)--phenylalanine, which in the solid state exists in the zwitterionic form as (2-carboxy-1-phenylethyl)iminiomethylene-1-naphth-2-olate, C₂₀H₁₇NO₃. The zwitterions are linked by a hydrogen bond from the carboxylic acid group to the negatively charged naphtholate O atom of an adjacent molecule.

Online 24 December 2004

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