Why the given compound is non-aromatic?

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1 Answer
anor277
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.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.org

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

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