See image — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

# Analysis of Resonating Structure Stability **Step 1: Identify the criterion for stability** A resonating structure is most stable when: - Negative charge resides on more electronegative atoms - Positive charge resides on less electronegative atoms - Charges are separated (avoiding like-charge proximity) **Step 2: Examine structure (A): $CH_2 = CH - \overset{\oplus}{CH} - CH - NH_2$** - Positive charge on carbon (less electronegative) - Negative charge on nitrogen (more electronegative) ✓ - Charges are well-separated across the conjugated system ✓ **Step 3: Examine structure (B): $\overset{\ominus}{CH_2} - \overset{\oplus}{CH} - CH = CH - NH_2$** - Negative charge on carbon (less electronegative) ✗ - Positive charge on carbon adjacent to it - Like charges close together (unfavorable) **Step 4: Examine structures (C) and (D)** - Both place negative charge on carbon in conjugated systems - Violates the principle that more electronegative atoms should bear negative charge - Less favorable than (A) **Conclusion:** Structure **(A) is the **least stable** because the negative charge on the more electronegative nitrogen atom and positive charge on carbon separated by conjugation creates an unfavorable charge distribution, making it the most unstable resonating form among the options.