In the title compound, C22H18ClN3O, the carbazole ring
system is essentially planar (r.m.s deviation = 0.003 A ° ), and
makes a dihedral angle of 9.01 (8) with the plane of the
chlorophenyl ring. In the crystal, neighbouring molecules are
linked into centrosymmetric R2
2(8) dimers by pairs of N—
H  O interactions and into a three-dimensional network by
C—H   interactions. The dimers are arranged into layers
parallel to (010