Acta Crystallographica Section E (May 2008)
2-[2-(1H-indol-3-yl)ethyliminiomethyl]-4-nitrophenolate
Abstract
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].