A) \[Ph-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix} Ph \\ | \end{smallmatrix}}{\mathop{C}}\,}}\,-Ph\]
B) \[Ph-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix} Me \\ | \end{smallmatrix}}{\mathop{C}}\,}}\,-Et\]
C) \[H-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix} Me \\ | \end{smallmatrix}}{\mathop{C}}\,}}\,-Et\]
D) \[Me-\underset{\begin{smallmatrix} || \\ OH \end{smallmatrix}}{\mathop{C}}\,-Et\]
Correct Answer: A
Solution :
\[\underset{(excess)}{\mathop{R-\overset{\begin{smallmatrix} O \\ \,|| \end{smallmatrix}}{\mathop{C}}\,-OR'\,+R''MgX\xrightarrow{\,}R-\overset{\begin{smallmatrix} O \\ \,|| \end{smallmatrix}}{\mathop{C}}\,-R'\,+R-\underset{\begin{smallmatrix} \,\,\,| \\ \,\,R' \end{smallmatrix}}{\overset{\begin{smallmatrix} \,\,OH \\ \,\,\,\,\,\,|\,\, \end{smallmatrix}}{\mathop{C}}}\,-R''}}\,\]
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