Question

Which of the following is the correct order for the stability of the following resonating structures?

• A. $I>II>III>IV$
• B. $I>II=IV>III$
• C. $I>II>IV>III$
• D. $I>IV>II>III$

Answer 1

The correct option is B $I>II=IV>III$

Structure $I$ has the maximum number of covalent bonds. Hence it is the most stable structure.

Structure $II$ and $IV$ both are the same and has the minimum charge seperation of the opposite charges. Hence structrure $II$ and $IV$ are more stable than structure $III$.

Hence the correct order for the stability of the resonating structures is:
$I>II=IV>III$