The Gomberg-type dimerization of bifluorenylidene radicals: an X-ray crystallographic investigation

LE Harrington, JF Britten, MJ McGlinchey

Index: Harrington, Laura E.; Britten, James F.; McGlinchey, Michael J. Tetrahedron Letters, 2003 , vol. 44, # 44 p. 8057 - 8060

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Citation Number: 13

Abstract

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 ...