April 14, 2021, 07:52:49 PM
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Topic: Annulenes  (Read 126 times)

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Offline Gameofketones

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Annulenes
« on: February 25, 2021, 01:18:24 AM »
Are odd numbered carbons possible in annulenes? Annulenes must be conjugated so are odd rings possible?

Offline clarkstill

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Re: Annulenes
« Reply #1 on: February 25, 2021, 03:21:29 AM »
By the IUPAC definition they are, but odd numbered ones have the formula CnH(n+1), which isn’t fully conjugated. More intuitively I’d call the cyclopentadienyl anion and the tropylium cation annulenes, but looking at the definition I’m not sure that they are!

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