Hafnium acetylacetonate

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Hafnium acetylacetonate[1]
IUPAC name
hafnium(4+); (Z)-4-oxopent-2-en-2-olate
Other names
Hafnium acetylacetonate
3D model (Jmol)
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)
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.[2]


Along with titanium tetrabutoxide (TBT), hafnium acetylacetonate serves as a catalyst for the production of poly(butylene terephthalate).[3]


  1. ^ "Hafnium Acetylacetonate". American Elements. Retrieved 2015-04-05. 
  2. ^ 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. 
  3. ^ 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.