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Frost Circle

18. Aromaticity / Frost Circle / Problem 3

Construct the Frost circles for the cyclopentadienyl anion and cyclopentadienyl cation. What is their difference?

A

The Frost circles show that the cyclopentadienyl cation is antiaromatic, while the cyclopentadienyl anion is aromatic.

B

The Frost circles show that the cyclopentadienyl cation is antiaromatic, while the cyclopentadienyl anion is aromatic.

C

The Frost circles show that the cyclopentadienyl cation is aromatic, while the cyclopentadienyl anion is antiaromatic.

D

The Frost circles show that the cyclopentadienyl cation is aromatic, while the cyclopentadienyl anion is antiaromatic.

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