Determination of rate constants for the reaction of aryl radicals with enolate ions

A Annunziata, C Galli, M Marinelli…

Index: Annunziata, Alfonso; Galli, Carlo; Marinelli, Manuela; Pau, Tullia European Journal of Organic Chemistry, 2001 , # 7 p. 1323 - 1329

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Citation Number: 24

Abstract

Abstract The rate of ring closure (k C) of o-(ω-alkenyl) aryl radicals by means of an intramolecular attack of the intermediate phenyl-type radical at the tethered double bond was found to be 4.2× 10 8 s− 1 (for 1•) and 7.6× 10 7 s− 1 (for 8•), both being 6-exo-trig processes, and 9.6× 10 9 s− 1 for the 5-exo-trig process of 3•. The k C rate constant of these radicals was calibrated with respect to a known rate of H-atom abstraction (k H). The ...