title: Crystal structure of a four-layered [3.3](3,5)pyridino-phane.
abstract: The title compound, C40H46N2 {systematic name: 12,30-di-aza-hepta-cyclo[21.13.1.1(5,19).1(6,18).1(10,14).1(24,36).1(28,32)]do-tetra-conta-1(37),5(40),6(41),10(42),11,13,18,23,28,30,32(39),36(38)-dodeca-ene}, has syn-anti-syn geometry wherein the two outer [3.3]meta-cyclo-phane (MCP) moieties have a syn geometry, and contain the facing benzene and pyridine rings at dihedral angles of 26.26 (10) and 26.46 (10)°, respectively. The rings of the central [3.3]MCP unit are not parallel, but orientated at a slight angle of 2.66 (9)°. Three bridging methyl-ene groups are disordered over two sets of sites in a 0.60:0.40 ratio. In the crystal, the mol-ecules are linked by C-H⋯N inter-actions and inter-molecular C-H⋯π short contacts, generating a three-dimensional network.
authors.affiliation: Department of Chemistry, Faculty of Education and Welfare Science, Oita University, 700 Dannoharu, Oita 870-1192, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Shibahara
authors.affiliation: International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
authors.forename: Motonori
authors.initials: M
authors.lastname: Watanabe
authors.affiliation: Evaluation Center of Materials Properties and Function, Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 6-1 Kasuga-koen, Kasuga-city, Fukuoka 816-8580, Japan.
authors.forename: Taisuke
authors.initials: T
authors.lastname: Matsumoto
authors.affiliation: Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
authors.forename: Kenta
authors.initials: K
authors.lastname: Goto
authors.affiliation: Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
authors.forename: Teruo
authors.initials: T
authors.lastname: Shinmyozu
keywords: C—H⋯N hydrogen bond; crystal structure; inter­molecular short contact; meta­cyclo­phane; pyridino­phane; transannular p-electronic inter­action