![]() | |
Names | |
---|---|
IUPAC name hafnium(4+); (Z)-4-oxopent-2-en-2-olate | |
Other names tetrakis(acetylacetonato)hafnium, hafnium tetrakis(acetylacetonate) | |
Identifiers | |
CAS Number | |
3D model (JSmol) | |
PubChem CID | |
InChI
| |
SMILES
| |
Properties | |
Chemical formula | C20H28HfO8 |
Molar mass | 574.93 g·mol |
Appearance | White to off-white powder |
Density | 1.42 g/cm |
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 , 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 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.
Uses
Along with titanium tetrabutoxide (TBT), hafnium acetylacetonate serves as a catalyst for the production of poly(butylene terephthalate).
Related compounds
- Tetrakis(1,1,1-trifluoro-2,4-pentanedionato)hafnium
References
- "Hafnium Acetylacetonate". American Elements. Retrieved 2015-04-05.
- Zherikova, K. V.; Morozova, N. B.; Kuratieva, N. V.; Baidina, I. A.; Igumenov, I. K. (November 2005). "Synthesis and structural investigation of hafnium(IV) complexes with acetylacetone and trifluoroacetylacetone". Journal of Structural Chemistry. 46 (6): 1039–1046. doi:10.1007/s10947-006-0239-2. S2CID 95300586.
- Banach, T.E; Berti, C; Colonna, M; Fiorini, M; Marianucci, E; Messori, M; Pilati, F; Toselli, M (August 2001). "New catalysts for poly(butylene terephthalate) synthesis". Polymer. 42 (18): 7511–7516. doi:10.1016/S0032-3861(01)00219-1.
- Morris, Melvin L.; Moshier, Ross W.; Sievers, Robert E. (1967). "Tetrakis(1,1,1‐trifluoro‐2,4‐pentanedionato)zirconium(and Hafnium)". Tetrakis(1,1,1-trifluoro-2,4-pentanedionato)zirconium (and Hafnium). Inorganic Syntheses. Vol. 9. pp. 50–52. doi:10.1002/9780470132401.ch15. ISBN 9780470131688.
Hafnium compounds | |
---|---|
Hf(II) | |
Hf(III) | |
Hf(IV) |