Question

The correct stability order of the following species/molecules is:
 

 

• A. \( q>r>p \)
• B. \( r>q>p \)
• C. \( q>p>r \)
• D. \( p>q>r \)

Hint:

Aromatic compounds are particularly stable due to their conjugated \(\pi\)-electron systems that follow Huckel's rule. Anti-aromatic compounds, on the other hand, are unstable, while nonaromatic compounds lack such electron delocalization.

Answer 1

The Correct Option is A

The species are:
\( p \) is antiaromatic, as it does not satisfy the conditions of aromaticity.
\( \text{Cq} \) is aromatic, satisfying Huckel's rule (having a cyclic structure with \( 4n + 2 \pi \)-electrons).
- \( r \) is nonaromatic, as it does not have the conjugation required for aromaticity and also does not have the 4n + 2 rule for aromaticity.
Therefore, the correct stability order is: \[ q>r>p \] Thus, the correct answer is option (1).