Uranium , complex with

Alkoxide gels, 23 60 Alkoxide gels, in optical fiber manufacturing, 11 145 Alkoxide initiators, 14 259 Alkoxide ligands, thorium, 24 770 Alkoxides, 12 190 25 72-86 controlled hydrolysis of, 23 56 iron, 14 533 mixed-metal, 25 100 titanium, 25 82 uranium complexation with,... 

Aryloxide ligands, thorium, 24 770 Aryloxides, uranium complexation with, 25 436-437... 

Recently, a uranium complex with p3Trol anion has been prepared and characterized by proton magnetic resonance spectroscopy 90). 

The uranium complexes with phospholyl ligand (formally analogous to Cp, Sec. 5.3.8) were also reported [263,396] [(5.62), from Ref. 263 with permission] ... 

The synthesis and reactivity of alkynyl(silylamido)uranium complexes of the type [(Me3Si)2N]3U-C=CR (R = Buc, (CH2) CH3 n = 2-5) was achieved by reaction of [(Me3Si)2N]2UCH2SiMe2NSiMe3 with the appropriate terminal alkynes.28 Treatment of the alkynyl(silylamido)uranium complexes with stoichiometric amount of acetone... 

Thermolysis of Cp 2U(=NAd)2 in benzene or hexane resulted in the intramolecular G-H bond activation of a methyl group on a pentamethylcyclopentadienyl ligand across the imido functional groups.123 The activation product is a reduced U(iv) metallocene bis(amide) complex with an A-bonded methylene unit derived from the methyl group attached to one amide group. Scheme 56 shows the formation of the ring bite uranium complex with the two possible structures that are consistent with the XH NMR data.123... 

Determination of U. To the slightly acidic solution containing not more than 150 pg of U, add 1 ml of 2% EDTA solution, 1 ml of dibenzoylmethane solution, and ammonia to pH 7-8. Extract the uranium complex with two portions of ethyl acetate. Dilute the extracts to volume with solvent in a 25-ml standard flask and measure the absorbance of the solution at 395 nm, using as reference the solvent or a reagent blank solution. 

Solubility data for the metal complexes in ScF CO2 are essential in order to develop models for the extraction processes and assess the feasibility of using ScF CO2 to replace organic solvents in conventional extraction processes. ScF CO2 solubility data for uranium complexes with TBP, P iketon or phosphine oxides are of particular interest fcM development of a ScF based process for reprocessing spent nuclear fuels. 

High-Valent Uranium Complexes with Multiply Bonded Ligands. 130... 

High-Valent Uranium Complexes with Nitrogen Donor Ligands. 140... 

Tetravalent uranium complexes with bridging organoimide ligands (MeC5H4)4U2(p.-NR)2 have been obtained in THE solution by valence disproportionation and ligand redistribution reaction ... 

Scheme 14.2 Potential reaction pathways bis(imido) uranium complex with aryl isocyanates. Reprinted with permission from Spencer et al. [47] Copyright 2008, American Chemical Society. See color plate section...

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