4-Methyl-5-phenyl-1H-pyrazol-3-ol

Abstract

The title compound, C(10)H(10)N(2)O, crystallizes with two independent mol-ecules in the asymmetric unit, having closely comparable geometries. The dihedral angles between the 1H-pyrazole and benzene rings in the two mol-ecules are 39.57 (14) and 41.95 (13)°. The two mol-ecules are each connected to neighbouring mol-ecules by pairs of inter-molecular O-H⋯N hydrogen bonds, forming dimers with R(2) (2)(8) ring motifs. These dimers are further linked into R(4) (4)(10) ring motifs by inter-molecular N-H⋯O hydrogen bonds, forming chains along [101]. The crystal structure is further stabilized by a C-H⋯π inter-action.

Fig. 1.

The molecular structure of the title compound, showing 20% probability displacement ellipsoids and the atom numbering scheme.

Fig. 2.

The crystal packing of the title compound, viewed approximately along the b axis, showing a one-dimensional chain.