A) \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-COO{{C}_{2}}{{H}_{5}}\]
B) \[{{C}_{6}}{{H}_{5}}COO{{C}_{2}}{{H}_{5}}\]
C) \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\]
D) \[{{C}_{6}}{{H}_{11}}C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}\]
Correct Answer: B
Solution :
The ester having a, hydrogen atom show Claisen condensation reaction. We know that ethyl benzoate \[({{C}_{6}}{{H}_{5}}COO{{C}_{2}}{{H}_{5}})\] does not contain \[\alpha \]-hydrogen. Therefore \[{{C}_{6}}{{H}_{5}}COO{{C}_{2}}{{H}_{5}}\] does not undergo claisen self-condensation.
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