Activation volumes for ester hydrolysis via elimination–addition
作者:Neil S. Isaacs、Tariq S. Najem
DOI:10.1139/v86-190
日期:1986.6.1
leaving group may undergo hydrolysis by elimination to an intermediate ketene, which rapidly hydrates. Examples are found in p-hydroxybenzoate, malonate, and acetoacetate esters of nitrophenols. The evidence for this mechanism (E1cb type) includes the independence of rate with pH in the region of dissociation of the acidic proton and, in particular, positive volumes of activation that contrast sharply