Acta Cryst. (2008). E64, o1924  [ doi:10.1107/S1600536808028559 ]

5-Methyl-2-phenyl-2H-pyrazol-3-ol

Q. Wang, Y. Zhang, R. Wang, Y.-L. Yang and F. Zhi

Abstract: The title compound, C₁₀H₁₀N₂O, known as Edaravone (MCI-186), was crystallized from methanol. The two independent molecules in the asymmetric unit are linked through an O-HO hydrogen bond. One molecule adopts a ketone form, while the other adopts an enol form. In the crystal structure, molecules are linked through intermolecular N-HO hydrogen bonds, forming chains running along the b axis.

Copyright © International Union of Crystallography
IUCr Webmaster