Chemical compound

Zirconium acetylacetonate is the coordination complex with the formula Zr(C5H7O2)4. It is a common acetylacetonate of zirconium. It is a white solid that exhibits high solubility in nonpolar organic solvents, but not simple hydrocarbons.[1]

The complex is prepared by treating zirconium oxychloride with acetylacetone:[1]

ZrOCl2 + 4 Hacac → Zr(acac)4 + 2 HCl + H2O

The complex has a square antiprismatic geometry with eight nearly equivalent Zr-O bonds of length 2.19 Å. The molecular symmetry is D2, i.e. the complex is chiral.[2] Compounds of high coordination number tend to be stereochemically nonrigid as indicated by the observation of one methyl signal by proton NMR spectroscopy.[3]

More volatile than Zr(acac)4 is the related complex of 1,1,1-trifluoroacetylacetonate.[3]

References

  1. ^ a b Young, R. C.; Arch, Arnold (1946). Zirconium Acetylacetonate. Inorg. Synth. Inorganic Syntheses. Vol. 2. pp. 121–148. doi:10.1002/9780470132333.ch35. ISBN 9780470132333.
  2. ^ Clegg, William (1987). "Redetermination of the structure of tetrakis(acetylacetonato)zirconium(IV)". Acta Crystallographica Section C. 43 (4): 789–91. doi:10.1107/S0108270187094083.
  3. ^ a b Morris, M. L.; Moshier, Ross W.; Sievers, Robert E. (1967). Tetrakis(1,1,1-trifluoro-2,4-pentanedionato)zirconium (and Hafnium). Inorg. Synth. Inorganic Syntheses. Vol. 9. pp. 50–52. doi:10.1002/9780470132401.ch15. ISBN 9780470132401.