2-[2-(1H-indol-3-yl)ethyliminiomethyl]-4-nitrophenolate

The title Schiff base, C17H15N3O3, exists in the zwitterionic form with the phenol H atom transferred to the imine group. Adjacent zwitterions are linked into a linear chain running along the a axis by an indole–hydroxy N—H⋯O hydrogen bond [3.100 (2) Å].

[1]  Leonard J. Barbour,et al.  X-Seed — A Software Tool for Supramolecular Crystallography , 2001 .

[2]  G. Sheldrick.  A short history of SHELX. , 2008, Acta crystallographica. Section A, Foundations of crystallography.