Acetylacetone

Acetylacetone

Structure of acetylacetone

Acetylacetone is an organic compound with the formula C₅H₈O₂. It is a colorless liquid that is a precursor to acetylacetonate, a common bidentate ligand. Acetylacetone exists in two tautomeric forms that rapidly interconvert.

Structure and Properties

Keto-enol tautomerism of acetylacetone

Acetylacetone is notable for its keto-enol tautomerism, where the keto form (pentane-2,4-dione) and the enol form (4-hydroxy-3-penten-2-one) are in equilibrium. The enol form is stabilized by intramolecular hydrogen bonding.

Tautomeric forms of acetylacetone

The equilibrium between the keto and enol forms is influenced by the solvent and temperature. In non-polar solvents, the enol form is predominant, while in polar solvents, the keto form is more stable.

Synthesis

Synthesis of acetylacetone

Acetylacetone can be synthesized by the thermal rearrangement of isopropenyl acetate or by the reaction of acetone with acetic anhydride in the presence of a base. The synthesis involves the formation of a diketone structure.

Reactions

Acetylacetone is a versatile ligand in coordination chemistry. It forms stable complexes with many metal ions, such as vanadium, copper, and iron. The resulting metal acetylacetonates are often used as catalysts or precursors to other chemical compounds.

Applications

Acetylacetone is used in the preparation of metal acetylacetonates, which are important in various industrial processes. It is also used as a solvent and as a chemical intermediate in organic synthesis.

Related Compounds

The acetylacetonate anion, derived from acetylacetone, is a common ligand in coordination chemistry. It forms chelate complexes with many transition metals.

Acetylacetonate anion

Gallery

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  Vanadyl acetylacetonate

Related Pages

• Keto-enol tautomerism
• Coordination chemistry
• Ligand
• Metal acetylacetonates

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  Acetylacetone structure
• 
  Keto-enol tautomerism of acetylacetone
• 
  Tautomeric forms of acetylacetone
• 
  Acetylacetonate anion
• 
  Synthesis of acetylacetone
• 
  Vanadyl acetylacetonate structure