Question

Which statement is correct about cyclopentadienyl anion?

• A. Both (I) and (II) are aromatic but (II) is more stable than (I).
• B. Both (I) and (II) are aromatic and have the same stability.
• C. (II) is more aromatic and more stable than (I) and it is non-aromatic.
• D. (I) is more stable than (II) through both are aromatic.

Answer 1

The correct option is A Both (I) and (II) are aromatic but (II) is more stable than (I).

Both have $6\pi$ electrons.

So both are aromatic, but (II) is more stable than (I) because (II) is uncharged (neutral) structure and also there is less angle strain . Hence A is correct option.