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Question 830002
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Haloalkanes and Haloarenes: SN2 reaction MCQ

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SN2 reactionEasyQuestion 830002

Question

SN2 reactions proceed with:
  1. A
    Inversion of configuration (Walden inversion)
    Correct
  2. B
    Retention of configuration
  3. C
    Racemisation
  4. D
    Elimination product only

Correct answer

Inversion of configuration (Walden inversion)

Explanation

SN2 is a concerted, one-step mechanism. The nucleophile attacks from the back of the leaving group (backside attack) → umbrella flip → inversion of configuration at the stereogenic centre (Walden inversion).

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