jo7b01998_si_002.cif (2.84 MB)

[24]Pentaphyrin(2.1.1.1.1): A Strongly Antiaromatic Pentaphyrin

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posted on 19.09.2017, 00:00 by Tomoki Yoneda, Tyuji Hoshino, Saburo Neya
[24]­Pentaphyrin­(2.1.1.1.1) 1 was synthesized by dehydrogenation of dihydropentaphyrin(2.1.1.1.1) 2 as the first example of vinylogous pentaphyrin. Pentaphyrin 1 takes a roughly planar structure and shows strong antiaromatic character, reflecting a 24π-conjugated circuit. In spite of the antiaromatic character and the relatively small circuit, 1 is stable under ambient conditions.

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