5-(Prop-2-yn­yl)-5H-dibenzo[b,f]azepine

The asymmetric unit of the title compound, C₁₇H₁₃N, contains two independent butterfly-shaped mol­ecules. The seven-membered azepine rings both adopt a boat conformation. The dihedral angles between the benzene rings in the two mol­ecules are 46.95 (11) and 52.21 (11)°.