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Names | |
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IUPAC name hafnium(4+); (Z)-4-oxopent-2-en-2-olate | |
Other names tetrakis(acetylacetonato)hafnium, hafnium tetrakis(acetylacetonate) | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
EC Number |
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PubChem CID | |
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Properties | |
C20H28HfO8 | |
Molar mass | 574.93 g·mol−1 |
Appearance | White to off-white powder |
Density | 1.42 g/cm3 |
Melting point | 193 °C (379 °F; 466 K) (decomposes) |
Solubility in benzene | good |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
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 complex has a square antiprismatic geometry with eight nearly equivalent Hf-O bonds. The molecular symmetry is D2, i.e., the complex is chiral. It is prepared from hafnium tetrachloride and acetylacetone, and base. Zr(acac)4 is very similar in structure and properties. [2]
Along with titanium tetrabutoxide (TBT), hafnium acetylacetonate serves as a catalyst for the production of poly(butylene terephthalate). [3]