Question
Identify the products $$X$$ and $$Y$$ in the given reaction, \[C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
Br\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}}+Mg\] \[\xrightarrow{\text{Dry}\,\,\text{ether}}X\xrightarrow{{{D}_{2}}O}Y\]
A.
\[X=C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
Br\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{2}}Mg,\] \[Y=C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]
B.
\[X=C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
\,MgBr
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}},\] \[Y=C{{H}_{3}}-\underset{\begin{smallmatrix}
|\,\,\,\, \\
D\,\,\,\,
\end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\]
C.
\[X=C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
\,MgBr
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}},\] \[Y=C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
OD\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}}\]
D.
\[X=C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
Br\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{2}}Mg,\] \[Y=C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
OH\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}}\]
Answer :
\[X=C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
\,MgBr
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}},\] \[Y=C{{H}_{3}}-\underset{\begin{smallmatrix}
|\,\,\,\, \\
D\,\,\,\,
\end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\]
Solution :
\[C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
Br\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}}+Mg\xrightarrow{\text{dry}\,\,\text{ether}}\] \[\underset{\left( X \right)}{\mathop{C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
\,MgBr
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}}}}\,\] \[\underset{\,\,\,\,\,\,\left( Y \right)}{\mathop{\xrightarrow{{{D}_{2}}O}C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\, \\
D\,\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{3}}}}\,\]