Synthesis, structure, and aromaticity of a hoop-shaped cyclic benzenoid [10]cyclophenacene.
The first hoop-shaped cyclic benzenoid compounds, [10]cyclophenacene derivatives that contain 40 pi electrons, have been synthesized in three or four steps from [60]fullerene by rationally designed chemical modification. The compounds thus synthesized are chemically stable, yellow-colored, luminescent, and EPR-silent. X-ray crystallographic analysis provided high precision structural data sets. On the basis of these results and theoretical investigations, the new cyclic benzenoid molecules were proven to be aromatic.
Nakamura
Eiichi
E
Department of Chemistry, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. nakamura@chem.s.u-tokyo.ac.jp
Tahara
Kazukuni
K
Matsuo
Yutaka
Y
Sawamura
Masaya
M