2,2′,5,5′-Tetrachlorobenzidine

In the crystal structure of the title compound, C12H8Cl4N2, molecules lie on crystallographic twofold axes at the centre of the C—C bonds linking the benzene rings, such that the asymmetric unit consists of a half-molecule. The individual molecules participate in intermolecular N—H...N, N—H...Cl, C—H...Cl and Cl...Cl [3.4503 (3) Å] interactions.