5-Ethyl-4-methyl-1H-pyrazol-3(2H)-one

Abstract

In the title compound, C6H10N2O, the 2,3-dihydro-1H-pyrazole ring is approximately planar, with a maximum deviation of 0.013 (1) Å. Pairs of inter-molecular N - H⋯O hydrogen bonds link neighboring mol-ecules into dimers, generating R 2 2(8) ring motifs. These dimers are further linked into two-dimensional arrays parallel to the bc plane by inter-molecular N - H⋯O hydrogen bonds. The crystal structure is further stabilized by C - H⋯π inter-actions.