2,7-DIBROMO-9,9-DIOCTYLFLUORENE-CHLOROFORM (1 0.25)/

In the solid state, the title compound, C29H40Br2.0.25CHCl(3), crystal lizes in the tetragonal system. The fluorene ring system is perfectly planar. The torsion angles in the octyl chains are all trans. These oc tyl chains are all orthogonal to the aromatic ring and are in the ab p lane of the unit cell. The stacking of aromatic units is non-existent. In the cyclopentadiene ring, the angle at the benzilic carbon is 101. 1 (3)degrees and is smaller than other angles in this part of the fluo rene ring system.