Why the given compound is non-aromatic?

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1 Answer
Jul 26, 2018

What does the Huckel criterion say? It has been explained to you in a recent, previous answer.

Explanation:

You gots the anion of a 7-membered ring....how many pi-"electrons"?

On the other hand, C_7H_7^+, so-called tropylium ion, that derives from "1,3,5-cycloheptatriene", DOES fill the Huckel criterion, and this has an extensive coordination chemistry.

cureffi.orgcureffi.org

In tropylium ion, the pi-"electrons" are conjugated around a planar ring....is the Huckel criterion fulfilled?

ANd what would happen if we REDUCED "1,3,5,7-cyclooctatetraene" by 2 electrons, ?

en.wikipedia.orgen.wikipedia.org

And if you do not know the answer to the last question, look up the structure of "uranocene".