ABSTRACT
The title compound, C20H17ClN2O2S, was obtained by a condensation reaction between 4-chloro-benzo-phenone and tosyl hydrazide. The plane of the methyl-substituted benzene ring forms dihedral angles of 20.12â (12) and 78.43â (13)° with those of the chlorine-substituted benzene ring and the benzene ring, respectively, with the last two rings forming a dihedral angle of 67.81â (13)°. The chlorine substituent was also found to be 0.868â (2):0.132â (2) disordered over these two rings. In the crystal, mol-ecules are linked through pairs of N-Hâ¯O hydrogen bonds, giving centrosymmetric cyclic dimers [graph set R 2 (2)(8)], which are linked by weak C-Hâ¯O and C-Hâ¯Cl inter-actions into a chain structure which extends along the a-axis direction.