See image — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

# Resonance Hybrid Contribution Rules Let me analyze each statement against the established criteria for canonical structure contributions: ## **(A) Stability Criterion — TRUE** - More stable canonical structures contribute more to the resonance hybrid - Stability is determined by: formal charge distribution, octet rule satisfaction, and charge placement - A structure with lower energy (more stable) has greater weight in the hybrid - ✓ **Correct** ## **(B) Charge Separation — FALSE** - Charge-separated structures actually contribute **LESS** than structures without charge separation - Separation of charges requires energy; structures with separated charges are less stable - The resonance hybrid is weighted more heavily by neutral or minimal-charge structures - ✗ **Incorrect** ## **(C) Charge-Electronegativity Match — TRUE** - When negative charge is on a more electronegative atom and positive charge is on a less electronegative atom, the structure is more stable - This obeys the electronegativity principle: negative charges should reside on more electronegative atoms - Example: In $O^-CH_3^+$ vs $O^+CH_3^-$, the first structure contributes more - ✓ **Correct** ## **(D) π-Bond Criterion — TRUE** - Structures with more π-bonds are generally more stable (more bonding interactions) - Greater number of bonds → lower energy → greater contribution to hybrid - More π-bonds mean better satisfaction of octet rule - ✓ **Correct** **Answer: A, C, D are true**