A-LevelChemistryHalogen derivatives9701/12 · May/June 2021 · Q251 Mark
Sodium methoxide, Na⁺CH₃O⁻, reacts with 2-chloro-2-methylpropane in a nucleophilic substitution reaction. The nucleophile is the CH₃O⁻ ion. Which row is correct?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Aintermediate or transition state: (CH₃)₃C⁺, product: (CH₃)₃COCH₃
Bintermediate or transition state: (CH₃)₃C⁺, product: (CH₃)₃CCH₂OH
Cintermediate or transition state: [Diagram of transition state showing partial bond between OCH₃ and C, and between C and Cl], product: HOCH₂C(CH₃)₃
Dintermediate or transition state: [Diagram of transition state showing partial bond between OCH₃ and C, and between C and Cl], product: H₃COC(CH₃)₃
✓ Correct answer
A: intermediate or transition state: (CH₃)₃C⁺, product: (CH₃)₃COCH₃
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