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ChemInform Abstract: Structure and Tautomerism of 3(5)-Amino-5(3)-arylpyrazoles in the Solid State and in Solution: An X-Ray and NMR Study.

✍ Scribed by J. Q. PUELLO; B. I. OBANDO; C. FOCES-FOCES; L. INFANTES; R. M. CLARAMUNT; P. CABILDO; J. A. JIMENEZ; J. ELGUERO

Publisher: John Wiley and Sons
Year: 2010
Weight: 29 KB
Volume: 28
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199750132

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✦ Synopsis

Structure and Tautomerism of 3(5)-Amino-5(3)-arylpyrazoles in the Solid State and in Solution: An X-Ray and NMR Study.

-The crystal and molecular structures of 5 examples of the title compounds are determined by X-ray analysis. The tautomer (I) is present for R: -H, -O-Me and -Cl, while the tautomer (II) is found for R: -NO2 and both tautomers (1:1) are observed for R: -Br. Solid state 13C NMR spectra are consistent with the crystallographic dates. In all compounds, the tautomer (I) possesses a relatively lower energy. -(PUELLO,

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