A Möbius antiaromatic complex as a kinetically controlled product in phosphorus insertion to a [32]heptaphyrin

Tomohiro Higashino, Byung Sun Lee, Jong Min Lim, Dongho Kim, Atsuhiro Osuka

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Singly twisted Möbius antiaromatic [34]heptaphyrin 8 and doubly twisted Hückel aromatic [34]heptaphyrin 9 were formed in the phosphorus insertion reaction to [32]heptaphyrin 7. The Möbius antiaromatic character of 8 has been confirmed on the basis of its X-ray structure, a weak paratropic ring current, ill-defined absorption characteristics, fast excited-state decay, and a relatively small TPA crosssection. In aliphatic nitrile solutions, complex 8 underwent the quantitative thermal migration of the P=O moiety to produce more stable 9 with the concurrent molecular topology switch, thus indicating the complex 8 to be a rare case of a kinetically controlled Möbius antiaromatic species.

Original languageEnglish
Pages (from-to)13105-13108
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number52
Publication statusPublished - 2012 Dec 21


All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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