Sodium acetylacetonate
Sodium acetylacetonate is an organic compound with the nominal formula Na[CH(C(O)CH3)2]. This white, water-soluble solid is the conjugate base of acetylacetone. Preparation
The compound is prepared by deprotonation of acetylacetone:

NaOH  +  CH2(C(O)CH3)2  →  NaCH(C(O)CH3)2  +  H2O
The anhydrous compound is produced by deprotonation with sodium hydride in an aprotic solvent such as THF:
NaH  +  CH2(C(O)CH3)2  →  NaCH(C(O)CH3)2  +  H2

Reactions
Oxidation of the salt gives tetraacetylethane. With metal salts, it reacts to give metal acetylacetonate complexes. Alkylation of sodium acetylacetonate can result in both O-alkylation and C-alkylation. The former gives the enol ether and the latter gives 3-substituted derivative of acetylacetone. Structure
The structure of the monohydrate has been established by X-ray crystallography. The sodium cation is bonded to the enolate oxygen centers. References

Diketones
Chelating agents
Ligands
Acetylacetonate complexes
3-Hydroxypropenals