title: 1-[(Anthracen-9-yl)carbon-yl]-2,7-di-meth-oxy-naphthalene: a chain-like structure composed of face-to-face type dimeric mol-ecular aggregates.
abstract: The asymmetric unit of the title compound, C27H20O3, contains two independent mol-ecules (AandB). The anthracene ring system is connected to the 2,7-di-meth-oxy-naphthalene core in a twisted manner, with dihedral angles of 86.38 (5) and 79.36 (8)°, respectively, for conformersAandB. In the crystal, face-to-face type dimeric mol-ecular aggregates of each conformer are observed. The dimer of conformerAis formed by two pairs of C-H⋯π inter-actions, and that of conformerBby a pair of (sp2)C-H⋯O hydrogen bonds. The dimers of conformerAare linked to each otherviaa π-π stacking inter-action between the anthracene rings to form a chain along thebaxis and the chains are aligned along thecaxis, forming a sheet structure. The dimers of conformerBare connected to each otherviaa couple of C-H⋯π inter-actions to form a chain along thebaxis. The chains are aligned along thecaxis through (sp2)C-H⋯O=C hydrogen bonds, forming a sheet parallel to thebcplane. The sheets of conformersAandBare alternately stacked along theaaxisviatwo kinds of inter-molecular (sp2)C-H⋯O=C hydrogen bonds.
authors.affiliation: Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture & Technology (TUAT), Koganei, Tokyo 184-8588, Japan.
authors.lastname: Siqingaowa
authors.affiliation: Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture & Technology (TUAT), Koganei, Tokyo 184-8588, Japan.
authors.forename: Takehiro
authors.initials: T
authors.lastname: Tsumuki
authors.affiliation: Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture & Technology (TUAT), Koganei, Tokyo 184-8588, Japan.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Ogata
authors.affiliation: Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture & Technology (TUAT), Koganei, Tokyo 184-8588, Japan.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Yonezawa
authors.affiliation: Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture & Technology (TUAT), Koganei, Tokyo 184-8588, Japan.
authors.forename: Akiko
authors.initials: A
authors.lastname: Okamoto
keywords: complementary hydrogen bonds; crystal structure; face-to-face type dimeric mol­ecular aggregate; independent mol­ecules; non-coplanarly accumulated aromatic rings arrangement