Metallation-silylation and kinetic studies of arylmethylacetylenes

JY Becker

Index: Becker,J.Y. Journal of Organometallic Chemistry, 1976 , vol. 118, p. 247 - 252

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Abstract

Abstract Arylmethylacetylenes, XC 6 H 4 C CCH 3, have been metallated with an excess of n-butyllithium in diethyl ether at 0 C. By quenching the metallation mixtures with trimethylchlorosilane at different times, mono-, di-and tri-silyl derivatives have been isolated. Pseudo-first order rate constants for the monometallation were calculated from the rate of formation of the silylated products. A Hammett plot gave ϱ= 1.3, indicating moderate ...