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organic compounds
The molecule of the title compound, C34H18N2O2, belongs to point group Ci. The area between the two opposing phenyl rings is overcrowded so that each phenyl ring is bent out of the diazaperylene skeleton in such a way that one ring is above and the other is below the molecular plane. Due to the ring strain thus induced, the C-C bonds in the bent phenyl rings are no longer equal. There are intramolecular hydrogen bonds between the OH groups and N atoms, which stabilize the molecule. The molecules are stacked in a herringbone fashion, with an interplanar distance of 3.43 (1) Å along the b axis where there are close interatomic contacts.