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The title compound, 4-(2-(4-Chlorophenyl)-4,5-diphenyl-1H-imidazole-1-yl)-2,3-dimethyl-1-phenyl-1,2dihydropyrzol-5-one (C32H25ClN4O), crystallizes in the monoclinic crystal system with space group P21/c with unit cell parameters: a = 7.7847(7) Å, b = 17.5077(14) Å, c = 19.8332(19) Å, β = 92.783(8)° and Z = 4. The crystal structure has been solved by using direct methods and refined by full matrix least-squares procédures to a final Rfactor of 0.085 for 1944 observed reflections. In the crystal structure, molecules are linked by C–H⋅⋅⋅O intermolecular hydrogen bonds, forming chains along b-axis. The structure also exhibits C–H⋅⋅⋅π interaction and intramolecular H-bonds of the type C–H⋅⋅⋅N.

SYNTHESIS AND CRYSTAL STRUCTURE ANALYSIS OF 4-(2- (4-CHLORO-PHENYL)-4,5-DIPHENYL-1H-IMIDAZOLE-1-YL)- 2,3-DIMETHYL-1-PHENYL-1,2-DIHYDROPYRZOL-5-ONE