1-(4-Chlorophenyl)-3-[3-(4-chlorophenyl)pyrazol-1-yl]propan-1-one

The title compound, C18H14Cl2N2O, is an isomer of the triplet alkyl nitrene decay product formed upon photolysis of β-azido propiophenone complexes. The mol­ecule exhibits an overall twist with dihedral angles of 10.32 (7) and 24.94 (4)° between the pyrazole plane and the planes of the chloro­phenyl rings. The crystal packing of the title compound features stacks of mol­ecules in alternating orientations running along the b axis; the approximate separation distance between the planes of neighboring mol­ecules in the stack is 3.66 A.