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Super‐heptazethrene |
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| Authors: | Dr Wangdong Zeng Dr Zhe Sun Dr Tun Seng Herng Dr Théo P Gonçalves Dr Tullimilli Y Gopalakrishna Prof Kuo‐Wei Huang Prof Jun Ding Prof Jishan Wu |
| Institution: | 1. Department of Chemistry, National University of Singapore, Singapore, Singapore;2. Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore;3. KAUST Catalysis Center and Division of Physical Sciences & Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia;4. Institute of Materials Research and Engineering, A*STAR, Singapore, Singapore |
| Abstract: | The challenging synthesis of a laterally extended heptazethrene molecule, the super‐heptazethrene derivative SHZ‐CF3 , is reported. This molecule was prepared using a strategy involving a multiple selective intramolecular Friedel–Crafts alkylation followed by oxidative dehydrogenation. Compound SHZ‐CF3 exhibits an open‐shell singlet diradical ground state with a much larger diradical character compared with the heptazethrene derivatives. An intermediate dibenzo‐terrylene SHZ‐2H was also obtained during the synthesis. This study provides a new synthetic method to access large‐size quinoidal polycyclic hydrocarbons with unique physical properties. |
| Keywords: | polycyclic hydrocarbons quinoids radicals synthetic methods zethrene |