title: 2,2',7,7'-Tetra-bromo-9,9'-spiro-bifluorene toluene hemisolvate.
abstract: There are two independent mol-ecules and one toluene solvent mol-ecule in the asymmetric unit of the title compound, C(25)H(12)Br(4)·0.5C(7)H(8). The dihedral angles between the fluorene ring systems are 85.30 (6) and 84.95 (6)° in the two mol-ecules. The disortions in angles from the ideal sp(3)-hybridization geometry around the tetra-hedral C atoms are due to the strain imposed by the central five-membered ring and steric effects.
authors.forename: Ailing
authors.initials: A
authors.lastname: Guo
authors.forename: Ruitao
authors.initials: R
authors.lastname: Zhu