Trifluoro-acetylacetonates

Also increasingly common, as CVD precursors, are many halogen-acetylacetonate complexes, such as trifluoro-acetylacetonate thorium, Th(C5H4F302)4, used in the deposition of thoriated tungsten for thermionic emitters, the trifluoro-acetylacetonates of hafnium and zirconium and the hexafluoro-acetylacetonates of calcium, copper, magnesium, palladium, strontium, and yttrium. 

Pyrolysis of hafnium acetyl acetonate, Hf(C5H702)3, at 400-750°C or hafnium trifluoro-acetylacetonate, Hf(C5H402p3)4 at 500-550°C with helium and oxygen as carrier gases. 

MOCVD of Zirconia. Yttria-stabilized zirconia is also deposited by MOCVD.Deposition can be accomplished by the codecomposition of the tetramethyl heptadiones of zirconium and yttrium, Zr(CjjHj902)3 and Y(CjjHj902)3, at 735°C. Deposition is also achieved by the decomposition of the trifluoro-acetylacetonates in a helium atmosphere above 300°C.P 1 Other potential MOCVD precursors are bis(cyclopentadienyl)zirconium dichloride, (C5H5)2ZrCl2, and zirconium (IV) trifluoroacetylacetonate,... 

There are clear similarities in the negative-ion mass spectra of the M(trifluoro-acetylacetonate)3 complexes (M = Vra or Al111).379 The major ion peak corresponds to (ML3)- and this is followed in intensity by one for (L) changes in oxidation state are evident for the metals in the fragment ions. 

Reaction of Os(PPh3)3H4 and /J-diketonates L gives Os(PPh3)2L2 (L = acetylacetonate, trifluoro-acetylacetonate, hexafluoroacetylacetonate). A cis structure is thought to be likely IR and H NMR data were obtained.429... 

A compound related to acetylacetone is 1,1,1-trifluoro-acetylacetone (abbreviated Htfa) ... 

Tris (trifluoroacetylacetonato) cobalt(III) is formed from a bidentate ligand trifluoro-acetylacetone CF3C(OH) = CHCO-CII J. The structure of the complex drawn. The isomerism predicted and drawn the structures of isomers if isomerism is possible. 

Three-membered rings. The combination of PhI(OAc)2 and Cu(II) trifluoro-acetylacetonate is particularly useful for generating nitrenoid from 6-methylpyridine-2-sulfonamide. ... 

Alternate methods a) U.S. authors have used processes involving fractional extraction of the aqueous phase with benzene solutions of diketones [thenoyl trifluoracetone E. H. Huffman and L. J. Beaufait, J. Amer. Chem. Soc. 71, 3179 (1949) trifluoro-acetylacetone B. G. Schultz and E. M. Larsen, J. Amer. Chem. Soc. 12, 3610 (1950)]. One disadvantage of the thenoyl trifluoro-acetone process may be that the Zr, which is usually the major component, is preferentially extracted into the benzene phase. 

Remarkably nonionic complexes of nickel containing chelating ligands of the acetylacetonate type are able to convert olefins such as butene, hexene, or octene into predominantly linear structures. The acidity of the ligand is essential for a catalytic activity and best results are obtained with hexafluoro (or trifluoro) acetylacetone (Table V). The oligomers contain all... 

PMMA = polymethyl methacrylate, PVC = poly(vinyl cinnamate) PODA = poly (octadecylacrylate) tAuAc = dimethyl-Au-trifluoro acetylacetonate... 

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