Orientation effects in the sulphonation of anisidinium ions in sulphuric acid

Abstract

The rate and position of monosulphonation of the ions NN-dimethyl-m-anisidinium, NN-dimethyl-p-anisidinium, and NNN-trimethyl-p-anisidinium have been recorded in D₂SO₄. The reaction is of the first order with respect to the anisidinium ion. A limited comparison of orientation effects of sulphonation and hydrogen isotope exchange is given with respect to the additivity principle of partial rate factors associated with substituents.