Question

Write product of the following $S_{N}2$ reaction showing change in sterochemistry?

• A. $F$ gets replaced, $S$ is the steriochemistry
• B. $Br$ gets replaced, $R$ is the steriochemistry
• C. $Br$ gets replaced, $S$ is the steriochemistry
• D. $F$ gets replaced, $R$ is the steriochemistry

Answer 1

The correct option is B $Br$ gets replaced, $R$ is the steriochemistry

This is an example of $S_{N}2$ reaction which involves inversion in configuration. In this reaction, $Br$ is replaced with $I$. The stereochemistry changes from $S$ to $R$.