The Yukawa-Tsuno Relationship for the. BETA.-Silicon Effect in the Solvolysis Rates of 2-(Aryldimethylsilyl) ethyl Chlorides

…, M Uchida, A Okada, MA Alam, R Fujiyama…

Index: Fujio, Mizue; Uchida, Mai; Okada, Ayumi; Alam, Md. Ashadul; Fujiyama, Ryoji; Siehl, Hans-Ullrich; Tsuno, Yuho Bulletin of the Chemical Society of Japan, 2005 , vol. 78, # 10 p. 1834 - 1842

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Citation Number: 13

Abstract

Solvolysis rates of 2-(aryldimethylsilyl) ethyl chlorides were determined conductimetrically in 60%(v/v) aqueous ethanol. The effects of aryl substituents at the silyl atom on the solvolysis rates at 50° C were correlated with essentially nonresonant parameters of r= 0.10 in terms of Yukawa–Tsuno (Y–T) Eq. 1, giving a ρ value of− 1.75. Such a high ρ value may be regarded as the effect of aryl ring on the bridged Si in the rate-determining step. The Si-bridging is ...

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