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 intra-molecular 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 inter-molecular C-H⋯O contact generates chains parallel to [101]. Short O-H⋯π and C-H⋯π contacts are also observed.