title: Macrocyclic 2,7-Anthrylene Oligomers.
abstract: A macrocyclic compound consisting of six 2,7-anthrylene units was successfully synthesized by Ni-mediated coupling of the corresponding dibromo precursor as a novel π-conjugated compound. This compound was sufficiently stable and soluble in organic solvents due to the presence of mesityl groups. X-ray analysis showed that the molecule had a nonplanar and hexagonal wheel-shaped framework of approximately S6 symmetry. The dynamic process between two S6 structures was observed by using the dynamic NMR technique, the barrier being 58 kJ mol(-1) . The spectroscopic properties of the hexamer were compared with those of analogous linear oligomers.
authors.affiliation: Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama, 700-0005, Japan.
authors.forename: Yuta
authors.initials: Y
authors.lastname: Yamamoto
authors.affiliation: Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama, 700-0005, Japan.
authors.forename: Kan
authors.initials: K
authors.lastname: Wakamatsu
authors.affiliation: Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama, 700-0005, Japan.
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Iwanaga
authors.affiliation: X-ray Research Laboratory, Rigaku Corporation, 3-9-12 Matubaracho, Akishima, Tokyo, 196-8666, Japan.
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Sato
authors.affiliation: Department of Chemistry and Materials Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan. stoyota@cms.titech.ac.jp.
authors.forename: Shinji
authors.initials: S
authors.lastname: Toyota
keywords: NMR spectroscopy; arenes; conformation analysis; macrocycles; oligomerization