title: 2-[2-(1H-indol-3-yl)ethyl-iminiomethyl]-4-nitro-phenolate.
abstract: The title Schiff base, C(17)H(15)N(3)O(3), 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-hydr-oxy N-H⋯O hydrogen bond [3.100 (2) Å].
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Hapipah M
authors.initials: HM
authors.lastname: Ali
authors.forename: M I
authors.initials: MI
authors.lastname: Mohamed Mustafa
authors.forename: M Razali
authors.initials: MR
authors.lastname: Rizal
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng