title: 4,4'-[Thio-phene-2,5-diylbis(ethyne-2,1-di-yl)]dibenzonitrile.
abstract: In the solid state, the title compound, C(22)H(10)N(2)S, forms centrosymmetric dimers by pairs of non-classical C-H⋯S hydrogen bonds linking approximately coplanar mol-ecules. The benzene ring involved in this inter-action makes a dihedral angle of only 7.21 (16)° with the thio-phene ring, while the other benzene ring is twisted somewhat out of the plane, with a dihedral angle of 39.58 (9)°. The hydrogen-bonded dimers stack on top of each other with an inter-planar spacing of 3.44 Å. C-H⋯N hydrogen bonds link together stacks that run in approximately perpendicular directions. Each mol-ecule thus inter-acts with 12 adjacent mol-ecules, five of them approaching closer than the sum of the van der Waals radii for the relevant atoms. Optimization of the inter-stack contacts contributes to the non-planarity of the mol-ecule.
authors.forename: João
authors.initials: J
authors.lastname: Figueira
authors.forename: Viatslav
authors.initials: V
authors.lastname: Vertlib
authors.forename: João
authors.initials: J
authors.lastname: Rodrigues
authors.forename: Kalle
authors.initials: K
authors.lastname: Nättinen
authors.forename: Kari
authors.initials: K
authors.lastname: Rissanen