Elimination–addition. Part XI. Electronic effects upon the reactivity of aryl vinyl sulphones towards amines

Abstract

Rates of addition of t-butylamine to a series of nuclear-substituted aryl vinyl sulphones have been measured for reactions in ethanol at 25°. The results are well correlated by the Hammett σρ relationship, the value of ρ=+1·59 being obtained with substituents possessing σ constants in the range –0·268 to +0·778. The reaction is compared with others which proceed via a carbanionic transition state.