3-(7,8,13,14-Tetrahydrodibenzo[a,i]phenanthridin-5-yl)benzene-1,2-diol

Abstract

In the title compound, C27H21NO2, the half-chair conformation of the alicyclic rings gives rise to a slightly folded structure of the central tricyclic tetrahydrophenanthridine unit. Tandem intramolecular O—H...N and O—H...O hydrogen bonds give rise to adjacent S(6) and S(5) rings, respectively, which dictate the conformation of the 5-aryl substituent. In the crystal structure, an intermolecular C—H...O contact generates chains parallel to [101]. Short O—H...π and C—H...π contacts are also observed.