The Field-Resonance Balance in Vinylogous Heteroaromatic Amidines

The Field-Resonance Balance In VInylogous Heteroaromatic Amidines 

Here pK (41b) is that of (41c) when dominant since A(NMe) 0 is expected for 4-pyridones. For (41a) when this is the minor species, that is, for R = -SOjMe or -NO2, we apply a correction of A(NMe) 0.4, on the order of that for (12a, 

The statistics of these equations are suspect since, by extending their range, the negative (Tr of NH2 may have caused some distortion. Nevertheless, even if this point is omitted the equation for contains a significant term in o-g, which 

One of the unfortunate features of tautomerism is that, despite frequent limited rationahzations that help so far as they go, no overall all-embracing understanding has yet appeared. A probable reason for this lies in the fault fine to which 

Prediction of Tautomer Preference in Aqueous Solution, Openeye Scientific Software. 

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The Field-Resonance Balance in Vinylogous Heteroaromatic Amidines 109... 

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