Synthesis,structure, and aromaticity of a hoop-shaped cyclic benzenoid [10]cyclophenacene |
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Authors: | Nakamura Eiichi Tahara Kazukuni Matsuo Yutaka Sawamura Masaya |
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Institution: | Department of Chemistry, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. nakamura@chem.s.u-tokyo.ac.jp |
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Abstract: | 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. |
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