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Which of the following is not aromatic?...

Which of the following is not aromatic?

A

cyclopentadienyl cation

B

cyclopropenyl cation

C

Tropylium cation

D

Cyclopentadienyl anion

Text Solution

Verified by Experts

The correct Answer is:
A


Cyclopentadienyl cation is antiaromatic as it is planar and has `4npie^(-)`s.
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