Description
HEXAFLUOROACETYLACETONE acts as a chelating ligand. For example, it can forms metal-chelate complexes with Ca(II), Zn (II), Cu(II), Ni(II), Co(II), Nd(III), Rh(III), Fe(III) and Cr(III), making it be useful in extracting related metal ions. It can also be used as liquid crystal intermediate.
References
Chattoraj, S. C., A. G. C. Jr, and R. E. Sievers. "Cadmium and zinc chelates of hexafluoroacetylacetone the gas phase reaction of a novel volatile cadmium complex with hydrogen sulphide." Journal of Inorganic & Nuclear Chemistry 28.9(1966):1937-1943.
Tomazic, Branko B., and J. W. O'Laughlin. "Synergic extraction of iron with hexafluoroacetylacetone and tributyl phosphate." Analytical Chemistry 45.8(2002):1519-1526.
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Chemical Properties
clear colorless to slightly yellow liquid
Uses
1,1,1,5,5,5-Hexafluoro-2,4-pentanedione acts as a chelating ligand. It is used as liquid crystal intermediate.
General Description
Hexafluoroacetylacetone forms metal-chelate complexes with Cu(II), Ni(II), Co(II), Nd(III), Rh(III), Fe(III) and Cr(III). Hexafluoroacetylacetone on hydration yields 1,1,1,5,5,5-hexafluoropentane-2,2,4,4-tetraol.
Purification Methods
It forms a dihydrate which has no UV spectrum compared with max (CHCl3) 273nm ( 7,800) for the anhydrous ketone. The dihydrate decomposes at ~90o. The hydrate (10g) plus anhydous CaSO4 (Drierite, 30g) are heated and distilled, the distillate is treated with more CaSO4 and redistilled. When the distillate is treated with aqueous NaOH and heated, the dihydrate crystallises on cooling. The Cu complex has m 135o (after sublimation). [Gilman et al. J Am Chem Soc 78 2790 1956, Belford et al. J Inorg Nucl Chem 2 11 1956, Beilstein 1 IV 3681.]
