[32]π Fused Core‐Modified Heptaphyrin with Möbius Aromaticity |
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| Authors: | Arindam Ghosh Dr Arvind Chaudhary Dr A Srinivasan Dr Cherumuttathu H Suresh Prof?Dr Tavarekere K Chandrashekar |
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| Institution: | 1. School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha, India;2. Inorganic & Theoretical Chemistry Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum -, Kerala, India |
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| Abstract: | A new fused core‐modified 32π heptaphyrin with Möbius aromatic character is reported. The 1H NMR data indicated a weak Möbius aromaticity at 298 K; however, at 213–183 K, the molecule predominates 4n]π Möbius conformation with strong diatropic ring current, which was further confirmed by X‐ray analysis. The protonation experiment led to preservation of the Möbius aromaticity at 298 K. Nevertheless, the experimental results were further supported by theoretical studies. Overall, this study represents the first example of Möbius aromatic fused core‐modified expanded porphyrin. |
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| Keywords: | aromaticity core modification Mö bius aromaticity porphyrinoids |
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