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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
- ^ a b Young, R. C.; Arch, Arnold (1946). "Zirconium Acetylacetonate [Tetrakis(2,4-pentanediono)zirconium]". Inorganic Syntheses. Vol. 2. pp. 121–148. doi:10.1002/9780470132333.ch35. ISBN 978-0-470-13233-3.
{{cite book}}:|journal=ignored (help) - ^ Clegg, William (1987). "Redetermination of the structure of tetrakis(acetylacetonato)zirconium(IV)". Acta Crystallographica Section C. 43 (4): 789–91. doi:10.1107/S0108270187094083.
- ^ a b 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 978-0-470-13168-8.
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