A) \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\]
B) \[C{{H}_{3}}CHO\]
C) \[{{C}_{6}}{{H}_{5}}Cl\]
D) \[HCHO\]
Correct Answer: A
Solution :
The claisen condensation is given by\[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\]. Two molecules of ethyl acetate condense to produce ethyl ace tone elate. \[\underset{\begin{smallmatrix} Ethyl\,\,acetate \\ (2molecules) \end{smallmatrix}}{\mathop{C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}}}\,+H\,\,C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\] \[\xrightarrow{{{C}_{2}}{{H}_{5}}ONa}\underset{Ethyl\,\,acetoacetate}{\mathop{C{{H}_{3}}COC{{H}_{2}}COO{{C}_{2}}{{H}_{5}}}}\,\]
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