Carboxylic Acids Question 1

Question: Which of the following has the most acidic proton

[Roorkee Qualifying 1998]

Options:

A) $ CH_3COCH_3 $

B) $ {{(CH_3)}_2}C=CH_2 $

C) $ CH_3COCH_2COCH_3 $

D) $ {{(CH_3CO)}_3}CH $

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Answer:

Correct Answer: D

Solution:

$ \begin{matrix} CH_3CO \\ {} \\ CH_3CO \\ \end{matrix}\underset{OCCH_3}{\mathop{ _{\swarrow }^{\nwarrow }\underset{{}}{\mathop{\underset{\downarrow }{\mathop{C}}–H}}}} $ So most acidic in nature.