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JEE Main
Exam
JEE Main
Subject
Chemistry
Chapter
Carboxylic Acid Derivatives

JEE Main · Chemistry · Carboxylic Acid Derivatives

Which is more stable?

Which is more stable?

Which is more stable?

Options

  1. AXX
  2. BYY
  3. CBoth are equally stable
  4. DCan't be predicted

Correct answer

B. YY

Step-by-step solution

In X structure,OH2+ group is formed which is a good leaving group. Hence, X is highly unstable.

In Y structure,resonance is observed and before protonation, 2 resonanting structures are possible which are given below:

Which is more stable?

In carboxylic acid the oxygen attached to carboxyl carbon is more electronegative and withdraws the electrons of bond. Hence, proton gets attached to the negatively charged carbon.

This is why Y structure is more stable than X.

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