Question

The major product formed when 1 - Bromo-3-Chlorocyclobutane reacts with metallic sodium in dry ether is 

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

In Wurtz reactions, when two alkyl halides react with metallic sodium in dry ether, an intramolecular reaction can occur to form cyclic compounds, often leading to bicyclic structures.

Answer 1

The Correct Option is B

When 1-Bromo-3-Chlorocyclobutane reacts with metallic sodium in dry ether, the Wurtz reaction occurs. The Wurtz reaction is an intramolecular coupling reaction that produces a cyclic product. In this case, the reaction involves the coupling of two molecules of 1-bromo-3-chlorocyclobutane, leading to the formation of a bicyclic product where the two original carbon atoms from the bromo and chloro positions are now bonded. The structure resulting from this coupling reaction is a bicyclo[2.2.2]octane derivative. Therefore, the correct answer is option (2).
Thus, the correct answer is option (2).