Reestimation of the Taft's substituent constant of the pentafluorophenyl group

T Korenaga, K Kadowaki, T Ema…

Index: Korenaga, Toshinobu; Kadowaki, Koichi; Ema, Tadashi; Sakai, Takashi Journal of Organic Chemistry, 2004 , vol. 69, # 21 p. 7340 - 7343

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Citation Number: 20

Abstract

The Taft's substituent constant of the pentafluorophenyl group (σ*(C6F5)) was reestimated to be 1.50 by correlation between IR spectral data (v CO) and σ* constants for a series of esters (involving the pentafluorobenzyl group) of 3-phenylpropanoic acid and butanoic acid. The possibility of the disturbance of the correlation by the intramolecular π-π interaction between C6F5 and C6H5 groups in pentafluorobenzyl 3-phenylpropanoate was excluded by ab ...