3,3′-di-2-naphthoyl-1,1′-(o-phenylene)dithiourea

In the molecule of the title compound, C(30)H(22)N(4)O(2)S(2), the central benzene ring is oriented at dihedral angles of 63.83 (3) and 1.37 (3)degrees with respect to the naphthalene ring systems, while the two naphthalene ring systems are oriented at a dihedral angle of 62.78 (3)degrees. Intramolecular N -H center dot center dot center dot O and N-H center dot center dot center dot N hydrogen bonds result in the formation of one five-and two six-membered rings. The twisting modes of the two side arms are different [C -N -C -O and C -N -C -N torsion angles = 11.1 (4) and 1.5 (3) degrees, respectively, in one arm, and -2.2 (4) and 0.8 (3) degrees in the other arm]. In the crystal structure, intermolecular N -H center dot center dot center dot S hydrogen bonds link the molecules into centrosymmetric dimers. There is a C -H center dot center dot center dot contact between the naphthalene rings and pi-pi contacts between the naphthalene rings and the naphthalene and benzene rings [centroid-centroid distances = 3.651 (1), 3.828 (1), 3.811 (2) and 3.786 (1) angstrom].