Chemistry · Organic Chemistry

For acetylacetone (pentane-2,4-dione), what is the correct relative order of stability among its tautomeric forms: the non-conjugated enol (I), the pure diketo form (II), and the intramolecularly hydrogen-bonded conjugated enol (III)?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1II > III > I
2II > I > III
3III > II > I✓
4I > II > III

Correct answer

III > II > I

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For acetylacetone (pentane-2,4-dione), what is the correct relative order of stability among its tautomeric forms: the non-conjugated enol (I), the pure diketo form (II), and the intramolecularly hydrogen-bonded conjugated enol (III)?

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For acetylacetone (pentane-2,4-dione), what is the correct relative order of stability among its tautomeric forms: the non-conjugated enol (I), the pure diketo form (II), and the intramolecularly hydrogen-bonded conjugated enol (III)?

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