See image — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

# Analysis of Resonating Structures of Vinyl Halide **Structure Analysis:** - **Structure (a):** $CH_2 = CH - Cl$ — neutral, no formal charges - **Structure (b):** $^-CH_2 - CH = \overline{Cl}^+$ — negative charge on C (sp² hybridized), positive on Cl - **Structure (c):** $H_2C^+ - CH = \overline{Cl}^-$ — positive charge on C (sp hybridized), negative on Cl **Stability Comparison:** 1. **Structure (a) vs (b) & (c):** Structure (a) is **most stable** because it has no formal charges. Both (b) and (c) are less stable due to charge separation. 2. **Structure (b) vs (c):** - In (b): Negative charge is on sp² carbon — better orbital overlap with adjacent $\pi$-system allows charge delocalization - In (c): Positive charge is on sp carbon — poorer orbital overlap; negative charge on highly electronegative Cl is less stable - Therefore: **(b) is more stable than (c)** **Stability Order:** $$a > b > c$$ **Why option (C) is incorrect:** Structures (a), (b), and (c) have **different formal charge distributions** and therefore **different intrinsic stabilities**. They cannot be equally stable. Structure (a) lacks charges (most stable), while (b) and (c) both have formal charges with different extents of stabilization. **The correct answer is (A):** $a > b > c$