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What is the correct order of stability for the following tautomeric compounds?(I) (II) (III)

  1. A
    I > II > III
  2. B
    III > II > I
  3. C
    II > I > III
  4. D
    II > III > I

Solution & Step-by-step Explanation

- III (Enol): Most stable because of extensive conjugation and intramolecular hydrogen bonding forming a 6-membered ring.II (Keto): Generally keto forms are stable, but less so than a conjugated, H-bonded enol in -dicarbonyls.I (Enol): Least stable as it lacks the specific stabilization factors of III.Correct order: III > II > I.

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What is the correct order of stability for the following tautomeric compounds?(I) (II) (III)
A
I > II > III
B
III > II > I
C
II > I > III
D
II > III > I

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