3-(9H-Fluoren-9-yl)-1,3-diphenyl-propan-1-one.

In the title compound, C(28)H(22)O, the fluorene ring system is approximately planar [maximum deviation = 0.044 (2) Å] and forms dihedral angles of 69.88 (6) and 89.

3-(9H-Fluoren-9-yl)-3-(4-methyl-phen-yl)-1-phenyl-propan-1-one.

In the title compound, C(29)H(24)O, the phenyl and methyl-phenyl rings are approximately perpendicular to each other, making a dihedral angle of 87.67 (10)°, and are oriented at dihedral angles of 62.49 (9) and 84.