Interpretation: The starting material of each of the two examples in the textbook should be replaced with one of its diastereomers and the product of SN2 displacement with the nucleophile shown should be written.
Concept Introduction:
Diastereomers are stereoisomers which are not mirror images of one another. Stereoisomers with two or more stereocenters can be diastereomers.
SN2 reactions are a type of nucleophilic substitution reactions. In SN2reactions, the addition of the nucleophile and the departure of the leaving group occur simultaneously. So, the nucleophile attacks the molecule from the opposite side of the leaving group. As a result, the geometry of the molecule changes and the stereochemical configuration of the molecule is inverted.
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