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Macrocyclic 2,7‐Anthrylene Oligomers
Author(s) -
Yamamoto Yuta,
Wakamatsu Kan,
Iwanaga Tetsuo,
Sato Hiroyasu,
Toyota Shinji
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201600230
Subject(s) - random hexamer , conjugated system , molecule , chemistry , hexagonal crystal system , crystallography , materials science , polymer chemistry , stereochemistry , polymer , organic chemistry
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 S 6 symmetry. The dynamic process between two S 6 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.