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Additive character of the resonance constants of azinyl groups

Research paper by O. P. Shkurko, V. P. Mamaev

Indexed on: 01 Mar '89Published on: 01 Mar '89Published in: Chemistry of Heterocyclic Compounds



Abstract

The increments for the endocyclic nitrogen atoms in various positions of the azine ring, which make it possible to calculate the resonance constants of azinyl groups via an additive scheme, were found. A correlation between the resonance constants and the π-electron charges in the corresponding ipso positions of the azine ring was noted. Correlated constants of the Hammett type, which quantitatively describe the CH acidities of methyl azines and the NH acidities of amino azines were derived.