Question

Draw Fischer projections for the following substitution reaction:

• A. At the chiral center,.inversion of stereochemical configuration occurs
• B. At the chiral center,.retention of stereochemical configuration occurs
• C. The product is a racemic mixture
• D. The mechanism is S${}_{N}1$

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A

At the chiral center,.inversion of stereochemical configuration occurs

B

At the chiral center,.retention of stereochemical configuration occurs

C

The product is a racemic mixture

D

The mechanism is S${}_{N}1$

The problem is definitely of $S_{N}1$ and the product will be a racemic mixture. The first, slow, rate-determining step
is the formation of a stable, tertiary carbocation as the $B{r}^{-}$ leaves. So the solution is: