Question

( Which of the following compounds will give
cyclopropane on treatment with sodium in dry

​

Answer 1

Answer:

The reactions (B) and (C) will not give a four-membered cyclic compound. Reactions are as shown above.

The compound in option B forms cyclohexanone and the compound in option C forms cyclopropane on reaction with sodium metal.

Answer 2

Propyl-1,3-dibromide treated with sodium in dry ether it gives cyclopropane.

Reaction:

• When 1,3-dibromopropane reacts with Na metal in presence of dry ether then we will get cyclopropane as a major product.
• Along with that sodium bromide will be formed as a by- product.
• Thus, the reaction thus produces an Alicyclic three membered ring that is cyclopropane in presence of sodium and dry ether, this reaction is called as Wurtz coupling reaction.

The complete question is :

Which of the following compounds will give cyclopropane on treatment with sodium in dry ether?