Acta Cryst. (2005). E61, o1544-o1545  [ doi:10.1107/S1600536805012766 ]

The enol form of nafazatrom

A. Hempel, N. Camerman, A. Camerman and D. Mastropaolo

Abstract: In the crystal structure of the title compound, 3-methyl-1-[2-(2-naphthyloxy)ethyl]-1H-pyrazol-5-ol (nafazatrom, Bay g 6575), C₁₆H₁₆N₂O₂, the enol form is present rather than the keto form. The pyrazole and naphthalene ring systems are planar and the angle between them is 66.76 (12)°. A strong O-HN hydrogen bond forces the molecules to form ribbons running along the b axis. Partial stacking of the naphthalene rings accounts for distinct hydrophilic and hydrophobic regions in the crystal structure.

Online 7 May 2005

Copyright © International Union of Crystallography
IUCr Webmaster