Crystal structure of pencycuron

In the title compound [systematic name: 1-(4-chloro­benz­yl)-1-cyclo­pentyl-3-phenyl­urea], C(19)H(21)ClN(2)O, which is a urea fungicide, the cyclo­pentyl ring adopts an envelope conformation, with one of the methyl­ene C atoms adjacent to the C atom bonding to the N atom as the flap. The dihedral angles between the mean planes of the central cyclo­pentyl ring (all atoms) and the chloro­benzyl and phenyl rings are 77.96 (6) and 57.77 (7)°, respectively. In the crystal, N—H⋯O hydrogen bonds link adjacent mol­ecules, forming C(4) chains propagating along the b-axis direction. The chains are linked by weak π–π inter­actions between the chloro­benzene rings [centroid–centroid separation = 3.9942 (9) Å], resulting in two-dimensional networks extending parellel to the (110) plane.