1,3-Diphenyl-4,5-dihydro-1H-pyrazol-5-one

Abstract

In the title pyrazolone derivative, C15H12N2O, the five-membered ring is approximately planar (r.m.s. deviation = 0.018 Å), and the N- and C-bound benzene rings are inclined to this plane [dihedral angles = 21.45 (10) and 6.96 (10)°, respectively] and form a dihedral angle of 20.42 (10)° with each other. Supra­molecular layers are formed in the crystal structure via C—H⋯O and C—H⋯N inter­actions, and these are assembled into double layers by C—H⋯π and π–π inter­actions between the pyrazole and C-bound benzene rings [ring centroid–centroid distance = 3.6476 (12) Å]. The double layers stack along the a axis being connected by π–π inter­actions between the N- and C-bound benzene rings [ring centroid–centroid distance = 3.7718 (12) Å].

1-(4-Methylphenyl)-3-phenyl-1H-pyrazol-5-yl 4-nitrobenzenesulfonate

“…The structure of the title compound is now reported in continuation of related structural studies (Wardell et al 2012;Baddeley et al, 2012).…”

“…For related structures and background references to pyrazoles, see: Wardell et al (2012); Baddeley et al (2012). For the synthesis, see: Galoyan et al (1969).…”

“…The twin domains were separated by using the TwinRotMat Reaction scheme. For further details see Baddeley et al (2012).…”

3,5-Dimethyl-1-(4-nitrophenyl)-1H-pyrazole

“…A general route to pyrazole derivatives involves reaction of an arylhydrazine, ArNHNH 2 , with a β-dicarbonyl compound, R′COCH 2 COY. In connection with recent structural studies Baddeley et al, 2012), we now wish to report the structure of the title compound, (I), prepared from 4-O 2 NC 6 H 4 NHNH 2 and MeCOCH 2 COMe.…”

“…For the synthesis, see: Butler & James (1982); Claramunt et al (2006). For recently reported structures, see ; Baddeley et al (2012).…”