54107-31-2Relevant academic research and scientific papers
Tautomerism of Some 5-Arylazo-2-thiohydantoin Derivatives as a Criterion of Their Acidity
Fahmy, H. M.,Aziz, M. A. Abdel,Aboutabl, M.,Abdel Azzem, M.
, p. 593 - 595 (2007/10/02)
The apparent pKa values of a series of 5-arylazo-2-thiohydantoin derivatives (IIa-e) are reported and discussed in terms of Hammett's correlations and by comparison with related model compounds.The results indicate that the negative charge on the anions is delocalized in a way that prevents direct conjugation with aromatic ring.
