抄録
A relationship between the acid dissociation constants of arylsulfonylurea deriyatives and the Hammett equation was examined quantitatively. 1) Acid dissociation constants of 60 compounds were determined at 20° and in an ionic strength of 0.2. 2) A good, linear relationship between log KNH and σ (or Σσ) was obtained except for several compounds. 3) A modified Hammett relationship (Eq.6) for nucleophilic reactions can be applied to the acid dissociation of N2-phenyl-N1-p-aceto-or-p-nitrobenzenesulfonylurea and its derivatives.
