KETO AND ENOL TAUTOMERS OF 4-BENZOYL-3-METHYL-1-PHENYL-5(2H)-PYRAZOLONE

被引：56

作者：

AKAMA, Y

SHIRO, M

UEDA, T

KAJITANI, M

机构：

[1] RIGAKU CORP,AKISHIMA,TOKYO 196,JAPAN

[2] SOPHIA UNIV,FAC SCI & TECHNOL,DEPT CHEM,TOKYO 102,JAPAN

来源：

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS | 1995年 / 51卷

关键词：

D O I：

10.1107/S0108270194007389

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The tautomeric keto and enol forms of 4-benzoyl-3-methyl-1 -phenyl-5(2H)-pyrazolone, C17H14N2O2, have been prepared and their crystal structures characterized by X-ray analysis. The unit cell of the enol form, 4-benzoyl-5-hydroxy-3-methyl-1-phenylpyrazole, contains two structural conformers. The intramolecular distances in the enol form [2.621 (3) and 2.663 (2) Angstrom] indicate the presence of hydrogen bonds, while the corresponding distance in the keto form [3.079(3) Angstrom] does not. In the keto form there is an intermolecular hydrogen bond [2.673(3) Angstrom] between the imino N(2) atom and the carbonyl O(1) atom.

引用

页码：1310 / 1314

页数：5

共 14 条

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[2] DETERMINATION OF INDIUM IN METALLIC ZINC BY FLAME ATOMIC-ABSORPTION SPECTROMETRY AFTER EXTRACTION WITH 1-PHENYL-3-METHYL-4-BENZOYL-5-PYRAZOLONE [J].