title: 1,4-Bis[(2,6-dimethoxy-phen-yl)ethyn-yl]benzene.
abstract: The title compound, C(26)H(22)O(4), is a derivative of 1,4-bis-(phenyl-ethyn-yl)benzene substituted by four meth-oxy groups at the terminal benzene rings. The asymmetric unit consists of two half-molecules; one centrosymmetric molecule is planar but the other is non-planar, with dihedral angles of 67.7 (1)° between the central benzene ring and the terminal benzene rings. In the crystal structure, mol-ecules form a zigzag mol-ecular network due to π-π [the inter-planar and centroid-centroid distances between the benzene rings are 3.50 (1) and 3.57 (1) Å, respectively] and C-H⋯π inter-actions (2.75 Å). Introduction of the four meth-oxy groups results in the supra-molecular architecture.
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Ono
authors.forename: Kenichi
authors.initials: K
authors.lastname: Tsukamoto
authors.forename: Masaaki
authors.initials: M
authors.lastname: Tomura
authors.forename: Katsuhiro
authors.initials: K
authors.lastname: Saito