Ethyl 1-sec-butyl-2-(4-chloro­phen­yl)-1H-benzimidazole-5-carboxyl­ate

In the title compound, C(20)H(21)ClN(2)O(2), the ethyl 1H-benzimidazole-5-carboxyl­ate ring system, excluding the methyl­ene and methyl H atoms, is almost planar, with a maximum deviation of 0.055 (1) Å, and makes a dihedral angle of 40.63 (4)° with the benzene ring. The sec-butyl group is disordered over two positions, with refined site occupancies of 0.855 (4) and 0.145 (4). In the crystal, mol­ecules are linked into chains along [010] via inter­molecular C—H⋯O hydrogen bonds and are further inter­connected by C—H⋯Cl inter­actions into two-dimensional networks parallel to (001). The crystal structure is further consolidated by C—H⋯π inter­actions.