See image — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

# Carbanion Analysis **Structure of Carbanion ($R_3C^-$):** A carbanion contains a carbon atom with a negative charge and three substituents. **Electron Configuration:** - Carbon has 4 valence electrons - The negative charge adds 1 more electron - Total valence electrons around carbon: **8 electrons** $$\text{C: } 4e^- + 1e^- (\text{from negative charge}) = 8e^- \text{ (complete octet)}$$ **Property 1 — Complete Octet:** ✓ The carbanion satisfies the octet rule with 8 electrons around the central carbon atom. **Property 2 — Nucleophile:** ✓ A carbanion carries a negative charge (electron-rich species) and readily donates this electron pair to electron-deficient centers (electrophiles). This is the defining characteristic of a nucleophile. Example: $R_3C^- + R'X \rightarrow R_3C-R' + X^-$ **Conclusion:** Since carbanion satisfies **both** properties: 1. Has a complete octet 2. Acts as a nucleophile (electron donor) **The answer is (3) Both the above**