A Doubly Zwitterionic Antiaromatic [28]Hexaphyrin Formed upon Deprotonation of 5,20‐Di(N‐methyl‐4‐pyridinium)‐Substituted [28]Hexaphyrin |
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| Authors: | Koji Naoda Prof Dr Atsuhiro Osuka |
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| Institution: | Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, Japan |
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| Abstract: | A rectangular 5,20‐di(4‐pyridyl) 26]hexaphyrin was reduced with NaBH4 to give the corresponding twisted Möbius aromatic 28]hexaphyrin. Subsequent double N‐methylation gave a dicationic 5,20‐di(N‐methyl‐4‐pyridinium) 28]hexaphyrin, which was converted to a doubly zwitterionic and Hückel antiaromatic 28]hexaphyrin upon deprotonation with sodium methoxide. |
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| Keywords: | deprotonation expanded porphyrin Hü ckel antiaromatic Mö bius aromatic zwitterion |
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