Uranyl diketonates

Subramanian, M.S. Viswanatha, A. Complexes of uranyl diketones with aromatic sul-phoxides, J. Inorg. Nucl. Chem. 31 (1969) 2575-2585. 

Uranyl 1,1,1 -Trifluoro-2.4-peiUan-d ionat- V1/3. 61 (UC14 + 1,3-Diketone)... 

ESR spectra, 511 Uranium(VI) complexes dioxoneocupferron, 512 Uranium hexaalkoxides physical properties, 347 Uranyl complexes cupferron, 512 formamide, 491 glycolic acid, 472 hexafluoroacetylacetone, 373, 377 photochemistry, 385 rearrangement, 384 maleic acid conformation, 467 neutral 1,3-diketones, 402 poly ketones, 399 Urea... 

Batzar, K. Goldberg, D.E. Newman, L.J. Effect of P-diketone structure on the synergistic extraction of uranyl ion by tributylphosphate, J. Inorg. Nucl. Chem. 29 (1967) 1511-1518. 

Bhattacharyya, A. Banerjee, S. Mohapatra, P.K. Basu, S. Manchanda, V.K. Extraction of ternary beta-diketonates of uranyl ion using some substituted monoamides, Solvent Extr. Ion Exch. 21 (2003) 687-705. 

Manchanda, V.K. Subramanian, M.S. Infrared and P.M.R. investigations of some complexes of uranyl beta diketonates with methyl substituted pyridine N-oxides, Aust. J. Chem. 27 (1974) 1573-1577. 

A detailed spectroscopic study of uranyl acetylacetonate [337-339] and other p-diketonates [339], as well as uranyl /u. v-(2-hydroxy-1 -naphthaldchyde) [U02(2H1N)2] [340] and uranyl fe-(2-hydroxybenzaldehyde) [341] was carried out. On the basis of the data obtained, the following structure was assigned to uranyl /u. v-(2-hydroxy-l-naphthaldehyde) [U02(H1N)2] 973 [340] (with permission), whose synthesis was described earlier [342] ... 

The Raman spectra for the studied uranyl p-diketonates (500-100 cm 1 and bis-(2-hydroxynaphthaldehyde) are presented in Figs. 5.6 and 5.7, respectively. 

Figure 5.6 The low-region Raman spectra (500-100 cm ) for uranyl P-diketonates (a) U02(acac)2, (b) U02(HDBM)2, (c) U02(HBTF)2. The irradiance units in spectra a and c are scaled by 1.0 x 10-4 and in b by 1.0 x 10 1. (From Ref. 339, with permission.)...

Stoichiometrical quantities of the HDBM (l,3-diphenyl-l,3-pentanedione) and U02 (CH3COO)2 were dissolved in tepid ethanol. The solution was concentrated and left at room temperature until crystallization. The product was washed with ether and dried at 130°C and a pressure of I0 7 mm Hg in an Abderhalden drying apparatus provided with P4O]0. Uranyl bis-(2-hydroxybenzaldehyde) [79] was synthesized from stoichiometric quantities of an alcoholic solution of 2-hydroxybenzaldehyde and an aqueous solution of uranyl nitrate trihydrate, U02(N03)2 3H20. It is noted [79] that, for uranyl P-diketonates his-(2-hydroxybenzaldehyde) and b is-(2 - h ydroxy-1 -naphtli a I d e h y de), their crystals do not exhibit the appropriate size and crystalline shape to perform polarization measurement in the solid state. 

Solvent-solvent and solvent-solute interactions were examined by measuring the Raman spectrum of CO2 in neat "C02 and in solutions of -diketones (acacH, tfacH and hfacH) or the complex [U02(hfac)2DMS0]". It was found that the Raman bands of "C02 containing -diketones are shifted to lower wave numbers compared to neat CO2 and no shift to lower wave numbers was observed for the uranyl complex solution. Acid-base interactions between the carbonyl oxygen atoms of diketonato ligand and... 

Ethers. Complexes with dialkylether ligands (as well as tetrahydrofuran) have been reported for uranyl chlorides, nitrates, thiocyanides, perchlorates, and fteto-diketonate ligands. The formulation of the complexes would suggest uranium coordination numbers ranging from six... 

At pH 6.5-S.5 the enol form of dibenzoylmethane (formula 54.1), a reagent of the P-diketone group, forms a yellow uranyl chelate complex which has been used for determination of uranium [76,77]. It dissolves in aqueous ethanol medium containing pyridine, or may be extracted with ethyl acetate, butyl acetate, or CHCI3 [78]. 

Turning now to the more tightly bound filled orbitals we examine the evidence from photoelectron spectroscopy. By comparing the ultra-violet excited photoelectron spectrum (UPES) of volatile uranyl beta-diketonate complexes [45] with the spectrum of complexes of the same ligands with other metals, two sharp ionisations are observed, at 10.30 and 10.80 eV, which. seem to be assignable to uranyl-oxygen ionisations. The lower of these ionisations increases in relative... 

Uranyl complexes of 2,4-acetoacetoxylidide (14) have been described, and two series of ferrocenyl-P-diketonate compounds, (15) and (16), have been... 

FIGURE 69 Liquid-crystalline uranyl complexes with tropolonate (top) and P-diketonate (bottom) ligands. 

Uranium-containing LCs, 140-144 Uranomesogens, 140-141 Uranyl P-diketonate complex, 141-144, 141/ Uranyl fluoride (UO2F2), 144 Uranyl ion, 140-141... 

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