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Hafnium acetylacetonate

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Hafnium acetylacetonate
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
  • 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
  • .O=C(C)\C=C(/)C.\C(C)=C/C(C)=O.\C(C)=C/C(C)=O.\C(C)=C/C(C)=O
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
Chemical compound

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

  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. S2CID 95300586.
  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.
  4. 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)
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