Keto and Enol Tautomers of 4-Benzoyl-3-methyl-1-phenyl-5(2H)-pyrazolone

摘要: The tautomeric keto and enol forms of 4-benzoyl-3-methyl-1-phenyl-5(2H)-pyrazolone, C 17 H 14 N 2 O , have been prepared their crystal structures characterized by X-ray analysis. unit cell the form, 4-benzoyl-5-hydroxy-3-methyl-1-phenylpyrazole, contains two structural conformers. intramolecular distances in form [2.621(3) 2.663 (2) A] indicate presence hydrogen bonds, while corresponding distance [3.079 (3) does not. In there is an intermolecular bond [2.673(3) between imino N(2) atom carbonyl O(1) atom.