In the title compound, C28H18N2O6. 2.5C(2)HF(3)O(2).-0.5C(6)H(6)O, the naph
thalenetetracarboxylic diimide moiety lies about an inversion centre and is
planar, but conjugation between the phenyl substituent and the tetracyclic
fragment is disrupted due to rotation around C-N bonds.