Benzo[c]cinnoline is a tricyclic organic compound with the formula C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>. Formally this species is derived by oxidative dehydrogenation of 2,2'-diaminobiphenyl. This heterocycle reacts with iron carbonyls to form C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>Fe<sub>2</sub>(CO)<sub>6</sub>.