The effect of solvent on the α-effect: CO, PO and SO2 centersElectronic supplementary information (ESI) available: Tables of rate constants. See http://www.rsc.org/suppdata/cc/b0/b007000i/

Abstract

The α-effect for the reaction of a sulfonyl ester exhibits a bell-shaped dependence of the α-effect on solvent composition as do the corresponding reactions with a carbonyl and a phosphinyl ester, and the magnitude of the α-effect is found to be dependent on the magnitude of the β_nuc value, suggesting TS stabilization as the cause of the α-effect.