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The title compound, C 16 H 14 Cl 2 N 4 , is isomorphous with 2,9-dimethyl-6H,13 H -5:12,7:14-dimethano­dibenzo[ d,i ]-[1,3,6,8]tetra­azecine [Rivera  et al.  (2009  ▶ ).  Acta Cryst.  E 65 , o2553] and has twofold symmetry, with two carbon atoms located on a twofold axis. Only van der Waals forces occur between molecules in the crystal. In the isomorphous compound the crystal structure is stabilized by weak C—H⋯π inter­actions.

2,9-Dichloro-6H,13H-5:12,7:14-dimethanodibenzo[d,i][1,3,6,8]tetraazecine