Reductive dimerizations of perchlorofluorene. Synthesis of an overcrowded, twisted ethylene

…, J Castaner, J Riera, G De la Fuente…

Index: Ballester, M.; Castaner, J.; Riera, J.; Fuente, G. de la; Camps, M. Journal of Organic Chemistry, 1985 , vol. 50, # 13 p. 2287 - 2292

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Citation Number: 14

Abstract

SnC12 (Scheme I). Fluorene 3 reacts with SnC12 in dioxane, giving unexpectedly a very good yield of 9H-heptadecachloro-9, 9'-bifluorenyl (l), the structure of which has been ascertained by analyses, spectra, and X-ray measurements. 12 Under the same conditions, related perchlorodiphenylmethane gives no dimer but perchlorodiphenylmethyl radical (PDM). S It is concluded therefore that perchloro-9-fluorenyl radical (PF) is formed. Also, ...