Which of the following reactions will not produce a racemic product?
Hydrocarbons · Class 11 · JEE Main Previous Year Question
Which of the following reactions will not produce a racemic product?
- a
- b
- c
- d✓
Step 1: Understand what produces a racemic mixture
A racemic mixture forms when:
- A new chiral center is created
- Attack occurs equally from both faces of a prochiral carbon
- The two faces are homotopic or react with equal probability
Step 2: Analyze each reaction
Answer: Option (d) — does NOT produce a racemic mixture
Key Points to Remember:
- Racemic mixture: equal amounts of R and S enantiomers
- If the intermediate carbocation has a plane of symmetry or gives a compound with internal mirror plane → not racemic
- Meso compounds are achiral despite having stereocenters
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