Hindered rotation in 9-arylfluorenes. Resolutions of the mechanistic question

WT Ford, TB Thompson, KAJ Snoble…

Index: Ford,W.T. et al. Journal of the American Chemical Society, 1975 , vol. 97, # 1 p. 95 - 101

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Citation Number: 27

Abstract

Abstract: Conclusive evidence is presented to rule out ionization as the process responsible for the dynamic nmr behavior of 9-arylfluorenes, in which rotation about the aryl-Cs bond is hindered. The observation of separate resonances for the diastereotopic isopropyl methyl groups of 2-(2-propyl)-9-mesityl-9-fluorenol (6b) and 2-(2-propyl)-9-mesityl-9-chlorofluorene (612) under conditions of rapid exchange of the mesityl methyl groups excludes any ...