is-the-anion-below-nonaromatic-antiaromatic-or-aromatic-if-it-is-aromatic-what-i

Question

Is the anion below nonaromatic, antiaromatic, or aromatic? If it is aromatic, what is its n in Hückel's rule? If not, explain the aromaticity rule it breaks.

Chemical structure of an aromatic hydrocarbon relevant to aromaticity in organic chemistry.

Accepted Answer

The anion is aromatic. Its n is 2.

Answer

The anion is aromatic. Its n is 5.

Answer

The anion is antiaromatic. It breaks the aromaticity rule because it does not have a (4n + 2) number of π electrons.

Answer

The anion is nonaromatic. It breaks the aromaticity rule because it is not planar.

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Is the anion below nonaromatic, antiaromatic, or aromatic? If it is aromatic, what is its n in Hückel's rule? If not, explain the aromaticity rule it breaks.