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NEET levelSingle correct optionDifficulty 1 of 3hx205

Walden inversion in an SN2 reaction means that

  1. Athe R label of the substrate is always changed to S in the product
  2. Ba planar carbocation gives equal amounts of both enantiomers
  3. Cthe nucleophile attacks from the side opposite to the leaving group and the configuration at that carbon is inverted
  4. Dthe nucleophile attacks from the same side as the leaving group

Answer: C

In SN2 the nucleophile approaches backside, and the three other groups flip like an umbrella. The spatial arrangement is inverted, but the R/S label may or may not change because it depends on CIP priorities.
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