Question

Draw Fischer projections for the following $S_{N}2$ substitution reaction:

• A. At the chiral center where substitution happens,.inversion of stereochemical configuration occurs
• B. At the other chiral center,.retention of stereochemical configuration occurs
• C. At the chiral center where substitution happens,.retention of stereochemical configuration occurs
• D. At the other chiral center,.inversion of stereochemical configuration occurs

Answer 1

Answer: (A), (B)

At the other chiral center,.retention of stereochemical configuration occurs

The problem is definitely of $S_{N}2$ and there will be an inversion of configuration at the stereocenter. So the solution is: