1-(2,4-Dinitrophenyl)-3-(2-hydroxyphenyl)-4-methyl-1H-pyrazole

The molecular structure of the title compound, 2[1-(2,4-dinitrophenyl)-4-me thyl-1H-pyrazol-3-yl]phenol, C16H12N4O5, containing a dinitrophenyl and a h ydroxy phenyl ring substituted to the pyrazole moiety is one of the product s obtained from the reaction of o-hydroxy propiophenone 2,4-dinitrophenylhy drazone. The phenyl and pyrazole rings are quite planar. The dihedral angle s between the pyrazole and the two phenyl rings are 23.5(1) and 15.3(1)degr ees. The interplanar angle between the phenyl ring is 32.6(1)degrees. The c rystal structure is stabilized by O-H ... N-, and O-H ... O-type intramolec ular hydrogen bonds and the packing of the molecules are stacked by C-H ... O-type intermolecular hydrogen bonds.