1,2-Diaryl-2-imidazolines. A structure–basicity relationship: application of the Hammett equation

Abstract

The pKa values of sixteen 1,2-diaryl-2-imidazolines have been determined and the influence of substituents at N-1 and C-2 upon basicity have been studied. The experimental data have been successfully correlated with the Hammett equation, the imidazoline ring being considered a substituent of the benzene ring. Comparisons with aniline and amidine systems have also been made.