Question

Which of the following statements are correct about $E1cB$ reaction?

• A. It proceeds via the formation of a carbanion intermediate.
• B. Strong EWG and poor leaving groups favour the reaction
• C. It is a unimolecular reaction with second order kinetics
• D. When $D$ is incorporated in the starting material by the solvent $EtOD$ and the reaction is interrupted before completion, no $D$ is found either in the substrate or in the product

Answer 1

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

It proceeds via the formation of a carbanion intermediate.
Strong EWG and poor leaving groups favour the reaction
It is a unimolecular reaction with second order kinetics

Statements $\left(a\right),\left(b\right),\left(c\right)$ are the characteristics of $E_{1}cB$ reaction. Statement (d) is wrong since, in $E_{1}cB$ reaction, the deuterated product is obtained.