title: Novel pi-expanded radialene macrocycles with inner cavity.
abstract: [structure: see text] Polyenyne macrocycles with pi-extended [9]- and [12]radialene frameworks have been synthesized. These radialenes exhibit restricted rotation of the aromatic rings, and the D3- and D4-symmetric structures in solutions have been determined by dynamic NMR. The macrocyclic radialenes bear small to medium inner cavities, and the small cavity of the pi-extended [9]radialene can incorporate a silver cation.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan. iyoda-masahiko@c.metro-u.ac.jp
authors.forename: Masahiko
authors.initials: M
authors.lastname: Iyoda
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Kuwatani
authors.forename: Sachiko
authors.initials: S
authors.lastname: Yamagata
authors.forename: Nobuko
authors.initials: N
authors.lastname: Nakamura
authors.forename: Mie
authors.initials: M
authors.lastname: Todaka
authors.forename: Gaku
authors.initials: G
authors.lastname: Yamamoto