Hafnium acetylacetonate
4Clegg.png)
| |
| Names | |
|---|---|
| IUPAC name
hafnium(4+); (Z)-4-oxopent-2-en-2-olate
| |
| Other names
tetrakis(acetylacetonato)hafnium, hafnium tetrakis(acetylacetonate)
| |
| Identifiers | |
3D model (JSmol)
|
|
PubChem CID
|
|
| |
| |
| 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]
Uses
[edit]Along with titanium tetrabutoxide (TBT), hafnium acetylacetonate serves as a catalyst for the production of poly(butylene terephthalate).[3]
Related compounds
[edit]- Tetrakis(1,1,1-trifluoro-2,4-pentanedionato)hafnium[4]
References
[edit]- ^ "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.