question_answer

In the following sequence of reactions, the end product formed is- \[HC\equiv C-C{{H}_{2}}Br\,\xrightarrow[ether]{Mg}\,\,A\,\,\xrightarrow{C{{H}_{3}}C\equiv CC{{H}_{2}}Br}\,\,B\]

A) \[HC\equiv CC{{H}_{2}}MgBr\]

B) \[HC\equiv CC{{H}_{2}}C{{H}_{2}}C\equiv CC{{H}_{3}}\]

C) \[C{{H}_{3}}C\equiv CC{{H}_{2}}MgBr\]

D) \[C{{H}_{3}}C\equiv CC{{H}_{3}}\text{ }and\text{ }BrC{{H}_{2}}C\equiv CMgBr\]

Correct Answer: B

Solution :