Unit 4 Chemistry Past Paper Questions

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Why would a product of a reaction not be optically active even though it contains a chiral carbon atom? (3 marks)

  • The nucleophile can approach from above and below the plane of the compound equally to form a racemic mixture of two enantiomers.

  • These enantiomers will rotate the plane of polarised light in opposite directions and cancel each other’s motion out, leading to no optical activity.