Question

Which of the following reaction(s) is/are non-stereospecific but stereoselective?

• A. $S{N}_1$
• B. $E_1$
• C. $E_2$
• D. $E_{1cB}$

Answer 1

The correct option is B $E_1$

In $E_1$, first ionization of $RX$ takes place and then abstraction of β-H atom by base takes place. The carbonium can rearrange and abstraction of H atom by base can be different. So the reaction is not stereospecific but stereoselective because of the formation of only one product.