The β??silicon effect. 4: substituent effects on the solvolysis of 1??alkyl??2??(aryldimethylsilyl) ethyl trifluoroacetates

…, MD Alam, A Shiiyama, T Munechika…

Index: Fujiyama, Ryoji; Alam, Md. Ashadul; Shiiyama, Aiko; Munechika, Toshihiro; Fujio, Mizue; Tsuno, Yuho Journal of Physical Organic Chemistry, 2010 , vol. 23, # 9 p. 819 - 827

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Citation Number: 8

Abstract

Abstract Solvolysis rates of 2-(aryldimethylsilyl)-1-methylethyl and 2-(aryldimethylsilyl)-1-tert- butylethyl trifluoroacetates were determined conductimetrically in 60%(v/v) aqueous ethanol. The effects of aryl substituents at the silicon atom on the solvolysis rates at 50 C were correlated with equation image parameters of r+= 0.15 with the Yukawa–Tsuno equation, giving ρ values of− 1.5 for both secondary α-Me and α-tert-Bu systems. The ρ values for ...