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.
B. Fernández, I. Perillo and S. Lamdan, J. Chem. Soc., Perkin Trans. 2, 1973, 1371 DOI: 10.1039/P29730001371
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