(R)-2,2′-Bis[N′-(3,5-dichloro­phen­yl)ureido]-1,1′-binaphthalene chloro­form disolvate

The title compound, C(34)H(22)Cl(4)N(4)O(2)·2CHCl(3), is a new urea based on the 1,1′-binaphthalene skeleton, which crystallizes with two mol­ecules of binaphthalene and four mol­ecules of chloro­form in the unit cell. The chloro­form solvent mol­ecules do not participate in non-covalent inter­actions and therefore, can be found in several positions. The binaphthalene mol­ecules are connected via a system of N—H⋯O hydrogen bonds between the ureido units. C—H⋯O inter­actions also occur. In contrast to unsubstituted urea, where mol­ecules form squares in crystals, the bulky substituents disturb this arrangement and three ureido groups form infinite chains, while the fourth inter­acts with a neighbouring binaphthalene ring via an N—H⋯π inter­action. The solvent molecules are disordered with occupancy ratios of 0.60:0.40, 0.58:0.42, 0.50:0.50 and 0.77:0.23.