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13C and 15N NMR investigation of the prototropic equilibrium of 2-hydroxy-3-methylindazole

✍ Scribed by W. Schilf; L. Stefaniak; G. A. Webb

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
327 KB
Volume
25
Category
Article
ISSN
0749-1581

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✦ Synopsis

It is shown that both I3C and ''N NMR measurements provide similar estimates of the position of the prototropic equilibrium exhibited by 2-hydroxy-3-methylindazole in three solvents. The "N NMR study of the pyridine and pyrrole types of nitrogen atoms provided the most quantitatively reliable results. The position of the prototropic equilibrium was found to be critically dependent on the acidity of the chosen solvent, the quinonoid form being predominant in weakly acidic media.

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