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IR, 1H NMR and 13C NMR spectra of isomeric 1-aryl-4-methyl-3- and-5-pyrazolecarboxylic esters

✍ Scribed by Pál Sohár; Ödön Fehér; Endre Tihanyi

Publisher
John Wiley and Sons
Year
1979
Tongue
English
Weight
371 KB
Volume
12
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The IR, ^1^H and ^13^C NMR spectra of six esters of 1‐aryl‐4‐methyl‐3‐ and 5‐pyrazolecarboxylic acids are reported. On the basis of their spectra the 3‐ or 5‐position of the substituent in such structural isomeric pairs can be established without recourse to the spectrum of the other member of the pair. The spectral data also give information on the conformation, which depends on the relative position and size of the hetero ring substituents.

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