Question

Which of the following is/are true regarding dry ether used in preparation of grignard reagent?

• A. It helps in stabilizing the Grignard reagent formed
• B. Keeps the reaction conditions dry and free from moisture.
• C. Retains the moisture which helps in the preparation of grignard reagent
• D. Both (a) and (b)

Answer 1

The correct option is D Both (a) and (b)

In preparation of grignard reagent, the use of dry ether is:
(a) To stabilize the grignard reagent formed

Ether molecules provide electrons to Mg so that completion of octet occurs in $Mg$. Hence, $Mg$ will be stablised due to the completion of the octet.

(b) to keep the reaction conditions dry and free from moisture. Even trace amount of moisture can
destroy a Grignard reagent.