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Which of the following is not aromatic?...

Which of the following is not aromatic?

A

B

C

D

Text Solution

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The correct Answer is:
2
The species is cyclopentadienyl cation. It has `4pie^(-)s`. Its bonding molecular orbitals `(pi_(2) and pi_(3))` are half-filled it is a diradical and antiaromatic.
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