title: rac-1,2,3,4-Tetra-hydro-1,4-methano-anthracene-6,7-dicarbonitrile.
abstract: The title compound, C(17)H(12)N(2), comprises a norbornane unit having a dicyanona-phthalene ring fused on one side. Both cyano groups are twisted slightly out of the plane of the naphthalene ring system [C-C-C-C torsion angle = 1.9 (2)°]. In the crystal, inversion-related mol-ecules are linked by pairs of weak C-H⋯N hydrogen bonds, forming dimers.
authors.affiliation: Department of Chemical Engineering, Feng Chia University, 40724 Taichung,  Taiwan.
authors.forename: Kew-Yu
authors.initials: KY
authors.lastname: Chen
authors.forename: Ming-Jen
authors.initials: MJ
authors.lastname: Chang
authors.forename: Tzu-Chien
authors.initials: TC
authors.lastname: Fang
authors.forename: Ming-Hui
authors.initials: MH
authors.lastname: Luo
authors.forename: Hsing-Yang
authors.initials: HY
authors.lastname: Tsai