title: Stereogenic motif consisting of rigid ring and intraannular chains: isolation and structures of stereoisomers of 9-alkyl-1,8-anthrylene-butadiynylene cyclic dimers.
abstract: Stereoisomers of the title pi-conjugated compounds with intraannular propyl and butyl groups were isolated by chromatography. The high barrier to isomerization is attributed to the steric hindrance between the alkyl chains and the rigid framework.
authors.affiliation: Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Okayama 700-0005, Japan. stoyo@chem.ous.ac.jp
authors.forename: Shinji
authors.initials: S
authors.lastname: Toyota
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Onishi
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kawai
authors.forename: Takaaki
authors.initials: T
authors.lastname: Morimoto
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Miyahara
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Iwanaga
authors.forename: Kan
authors.initials: K
authors.lastname: Wakamatsu