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Tautomers of Acetylacetone (C5H8O2)

Usually the keto tautomer is favored

Keto = ketone

Enol = alcohol

may also be referred to as an alkenol

Keto Acetylacetone

With geometry optimization

Molecule (2).png

But PubChem's 3D structure has both oxygens pointing in the same direction
Error creating thumbnail: File missing
But NIST has the oxygens pointing different directions
KetoacetylacetoneStructure.png

Proton NMR (Hartree-Fock)

A reminder of Proton NMR stretches: File:nmr1.gif

NmrKeto.png

Enol Acetylacetone

Molecule.png

Proton NMR (Hartree-Fock)

A reminder of Proton NMR stretches: File:nmr1.gif

NmrEnol.png