2,4-Pentanedione, 1,1,1,5,5,5-hexafluoro

OgFgHP, Phosphorodiiluoridic add, rhenium complex, 26 83 OgFgCgH, Acetic add, trifluoro-, ruthenium complex, 26 254 tungsten complex, 26 222 OgFgCjHg, 2,4-Pentanedione, 1,1,1,5,5,5-hexafluoro-, palladium complexes, 27 318-320... 

Recently Bonati and Wilkinson4 reported that tetracarbonyl-di-jti-chloro-dirhodium(I) reacts with various 1,3-diketones in the presence of barium carbonate to give compounds such as Rh(C0)2(CgH702). Similarly, chloro(pentacarbonyl)manga-nese(I) and l,l,l,5,5,5-hexafluoro-2,4-pentanedione afford the complex Mn(C0)4(CsHF602) in low yields (14%).5... 

Barreca et al. reported the preparation of columnar Ce02 nanostructures on Si(lOO) and AI2O3 substrates by a catalyst-free CVD process at 623-723 K (Barreca et al., 2006,2007). Ce(hfa)3 diglyme (hfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione diglyme = bis(2-metoxyethyl)ether) is used as the cerium molecular source. The obtained Ce02 columnar... 

Figure 4.43. Thermogravimetric analysis of organomagnesium CVD precursors, indicating the dependence of molecular structure on its decomposition temperature. The ligand abbreviations are dpm = 2,2,6,6-tetramethyl-3,5-heptanedionate, TMEDA = Ai, Ai, A, W -tetramethylethylenediamine, hfa = l,l,l,5,5,5-hexafluoro-2,4-pentanedione, HTEEDA = H(W, N, N, A Atetraethylethylene diamine). Reproduced with permission from Chem. Mater. 2005,17(23), 5697. Copyright 2005 American Chemical Society.

Tris(l, 1, l,5,5,5-hexafluoro-2,4-pentanedionato)alumi-num can be obtained by the reaction of anhydrous aluminum chloride with l,l,l,5,5,5-hexafluoro-2,4-pentanedione in carbon tetrachloride. A desirable feature of the method is that the major by-product of the reaction, hydrogen chloride, is gaseous. 

Commercially available 1,5-cyclooctadiene and 1,1,1,5,5,5-hexafluoro-2,4-pentanedione are used as received. The preparations are performed in air. The operations should be performed in a hood since both reactants are very malodorous. 

For y -diketone = l,l,l-trifluoro-2,4-pentanedione, olefin = 1,5-cycloocta-diene or 1,3,5,7-cyclooctatetraene. For yS-diketone = 1,1,1,5,5,5-hexafluoro-... 

Europium (III) complexes of other -diketones. The complexes, (C2H5)3NH[Eu(hfa)4] and (CH3)4N[Eu(hfa)4], were synthesized by the methods described by Melby, Rose, Abramson, and Caris (15). The tris bidentate chelates, Eu(tfa)3 2H2O, and Eu(tta)3 3H2O, were obtained commercially (Distillation Products Industries) and were analyzed prior to use. The ligands corresponding to the various symbols are as follows tfa—l,l,l-trifluoro-2,4-pentanedionate, hfa—1,1,1,5,5,5-hexafluoro-2,4-pentanedionate, and tta—4,4,4-trifluoro-1 (2-thienyl) -1,3-butanedionate. 

Direct Combination of a 1,3-Diketone, an Amine, and a Metal Ion. Direct combination is a potentially useful reaction, and it has been used to prepare metal-salicylaldimine compounds. The procedure consists of mixing (and refluxing if necessary) a stoichiometric mixture of salicylaldehyde with an amine, a metal ion, and a base in dilute aqueous methanol. This procedure has not been applied commonly to the preparation of metal derivatives of jS-keto imines, although the preparation of 4,4 -(ethylene-dinitrilo)di-2-pentanonatocopper(II) from 2,4-pentanedi-one (acetylacetone), ethylenediamine, and copper has been described. Attempts to effect condensation of 1,1,1,5,5,5-hexafluoro-2,4-pentanedione (hexafluoroacetylacetone) and ethylenediamine by direct combination of the reactants in the presence of copper(II) acetate were imsuccessful. ... 

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