Pentaphyrin(220.127.116.11.1): A Strongly Antiaromatic Pentaphyrin
datasetposted on 19.09.2017, 00:00 by Tomoki Yoneda, Tyuji Hoshino, Saburo Neya
Pentaphyrin(18.104.22.168.1) 1 was synthesized by dehydrogenation of dihydropentaphyrin(22.214.171.124.1) 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.