Abstract
Abstract For several 1,3-diaryl- and 1-alkyl-3-aryltriazenes, infraa red evidence of tautomerism I⇆II has been given;1,2 in their ir spectra, in fact, these compounds generally show two separate N-H stretching bands. The relative intensities of these bands are influenced by the substituents,1,2 It was recognized, how ever, that the tautomeric equilibrium constants KT cannot be determined with accuracy by ir bands intensity measurements as the molar extinction coefficients of forms I and II are not known.1
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