9-Benzylidene-2,7-dichloro-4-oxiranyl-9H-fluorene.

The molecule of the title compound, C22H14Cl2O, is built up from three fused rings, two six-membered and one fivemembered, which are coplanar to within 0.015 (3) Å. The dihedral angles between the fluorene ring plane and the benzene and oxirane rings are 58.83 (13) and 55.99 (34)°, respectively. C—H⋯O hydrogen bonds link the molecules into sheets running parallel to the (010) plane. The crystal studied was an inversion twin. [ABSTRACT FROM AUTHOR]