Hafnium acetylacetonate

Hafnium acetylacetonate

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Names
IUPAC name hafnium(4+); (Z)-4-oxopent-2-en-2-olate
Other names Hafnium acetylacetonate
Identifiers
CAS Number	17475-67-1
Jmol 3D model	Interactive image
PubChem	21953595
InChI InChI=1S/4C5H8O2.Hf/c4*1-4(6)3-5(2)7;/h4*3,6H,1-2H3;/q;;;;+4/p-4/b4*4-3-; Key: MCFIMQJAFAOJPD-MTOQALJVSA-J
SMILES [Hf+4].O=C(C)\C=C(/[O-])C.[O-]\C(C)=C/C(C)=O.[O-]\C(C)=C/C(C)=O.[O-]\C(C)=C/C(C)=O
Properties
Chemical formula	C20H28HfO8
Molar mass	574.93
Appearance	White to off-white powder
Density	1.42 g/cm3
Melting point	193 °C (379 °F; 466 K) (decomposes)
Boiling point	82 °C (180 °F; 355 K)
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Hafnium acetylacetonate, also known as Hf(acac)₄, is a coordination compound with formula Hf(C₅H₇O₂)₄. This white solid is the main hafnium complex of acetylacetonate. The molecule has D₂ symmetry. It is prepared from hafnium tetrachloride and acetylacetone, and base. Zr(acac)₄ is very similar in structure and properties.

Uses

Along with titanium tetrabutoxide (TBT), hafnium acetylacetonate serves as a catalyst for the production of poly(butylene terephthalate).