Assertion A : Enol form of acetone CH 3 COCH 3 exists in < 0 . 1 % quantity. However, the enol form of…

Assertion A : Enol form of acetone CH3COCH3 exists in <0.1% quantity. However, the enol form of acetyl acetone CH3COCH2OCCH3 exists in approximately 15%quantity.

Reason R : enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone.

Choose the correct statement:

  1. A is false but R is true
  2. Both A and R are true and R is the correct explanation of A
  3. Both A and R are true but R is not the correct explanation of A
  4. A is true but R is false

Solution

Acetyl acetone in enol form have intramolecular H-bonding, which is absent in acetone.

enol form of Acetyl acetone is stabilised by conjugation and by intramolecular H-bonding.

enol form of acetone is very less <0.1%

Asked in: JEE Main 2021 (16 Mar Shift 1)

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