The reaction of phenylethynyllithium with 9-bromofluorene yields 9, 9′-bifluorenylidene, 8, 9, 9′-bifluorenyl, 9, and a molecule 10, of formula C52H32, in which coupling has occurred between a 9, 9′-bifluorenyl fragment and a 9, 9′-bifluorenylidene moiety such that a C (9) position of the former is attached to a C (3) site of the latter. This parallels the unsymmetrical radical coupling of triphenylmethyl radicals, which leads to the Gomberg dimer, rather ...
[Banide, Emilie V.; Ortin, Yannick; Seward, Corey M.; Harrington, Laura E.; Mueller-Bunz, Helge; McGlinchey, Michael J. Chemistry - A European Journal, 2006 , vol. 12, # 12 p. 3275 - 3286]
