Electronic spectra of lithium salts of substituted fluorenes. Evidence for the. pi.-inductive effect of unshared pairs

JH Hammons

Index: Hammons,J.H. Journal of Organic Chemistry, 1968 , vol. 33, # 3 p. 1123 - 1127

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Citation Number: 6

Abstract

Electronic absorption spectra have been recorded for lithium salts of twelve substituted fluorenes in cyclohexylamine. The compounds include 2-fluorofluorene1 2- dimethylaminofluorene, the five isomeric methylfluorenes, and the five methoxyfluorenes. Relative to lithium fluorenyl itself, salts bearing a substituent at the 1, 2, or 4 position show a hypsochromic shift, whereas those substituted at the 3 or 9 position show a bathochromic ...