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15N‐ and13C‐N.M.R. Study of Azo‐hydrazone Tautomerism of 3‐methyl‐1‐phenylpyrazole‐4,5‐dione 4‐phenylhydrazone in dimethyl sulphoxide and pyridine

 

作者: Antonín Lyčka,   Heinz Mustroph,  

 

期刊: Journal für Praktische Chemie  （WILEY Available online 1989）
卷期: Volume 331, issue 1  

页码: 11-14

 

ISSN:0021-8383

 

年代: 1989

 

DOI:10.1002/prac.19893310103

 

出版商: WILEY‐VCH Verlag GmbH

 

数据来源: WILEY

 

摘要:

AbstractThe15N‐ and13C chemical shifts and1J(15Nα15Nβ) coupling constants of 3‐methyl‐1‐phenylpyrazole‐4,5‐dione 4‐phenylhydrazone (1) were measured in dimethyl sulphoxide and pyridine solutions. It was found that compound1exists fully in its hydrazone form in these two solvents, contrary to the previously published data which propose equilibrium mixture of the hydrazon

 

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