Two structural isomers, 3, 6-bis (2-chlorophenyl)-1, 4-dihydro-1, 2, 4, 5-tetrazine,(I), and 3, 5- bis (2-chlorophenyl)-4-amino-1H-1, 2, 4-triazole,(II), both C14H10Cl2N4, form chain-like structures in the solid state, stabilized by N—H⋯ N and N—H⋯ Cl hydrogen bonds. A contribution from weak interactions to the strong hydrogen-bond network is observed in both structures. The secondary graph sets for intermolecular hydrogen bonds [R_2^ 2 (11) for (I ...
