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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
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B
Keeps the reaction conditions dry and free from moisture.
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C
Retains the moisture which helps in the preparation of grignard reagent
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D
Both (a) and (b)
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Solution

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.

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