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BITSAT 2011

Exam: BITSAT
Year: 2011
Subject: Chemistry
Chapter: Aldehydes and Ketones

BITSAT 2011 · Chemistry · Aldehydes and Ketones

Which of the following esters cannot undergo Claisen self...

Which of the following esters cannot undergo Claisen self condensation?

Options

A $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOC}_{2} \mathrm{H}_{5}$
B $\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{COOC}_{2} \mathrm{H}_{5}$
C $\mathrm{C}_{6} \mathrm{H}_{11} \mathrm{CH}_{2} \mathrm{COOC}_{2} \mathrm{H}_{5}$
D $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{COOC}_{2} \mathrm{H}_{5}$

Correct answer

B. $\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{COOC}_{2} \mathrm{H}_{5}$

Step-by-step solution

Claisen condensation is given by esters having two

\alpha

-hydrogen atoms.

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