Tributyl phosphine oxide

Phosphine, methyl-n-propylphenyl-rhodium complexes asymmetric hydrogenation, 6,250 Phosphine, neomenthyldiphenyl-rhodium complexes asymmetric hydrogenation, 6,250 Phosphine, phenyl-, 2,992 Phosphine, o-phenylenebis(dimethyl-, 2,993 Phosphine, p-phenylenebis(diphenyl-, 2,993 Phosphine, seleno-metal complexes, 2,664 bidentatc, 2, 664 Phosphine, triaryl-photographic stabilizer, 6,103 Phosphine, tributyl-, 2, 992 oxide... 

Phosphine, seleno-metal complexes, 664 bidentate, 664 Phosphine, tributyl-, 992 Phosphine, trichloro-, 990 Phosphine, tricyclohexyl-, 992 Phosphine, triethyl-, 992 Phosphine, trifluoro-jt acidity, 1034 Phosphine, triisopropyl-, 992 Phosphine, trimethyl-, 990, 992 oxides... 

Catalytic forms of copper, mercury and silver acetylides, supported on alumina, carbon or silica and used for polymerisation of alkanes, are relatively stable [3], In contact with acetylene, silver and mercury salts will also give explosive acetylides, the mercury derivatives being complex [4], Many of the metal acetylides react violently with oxidants. Impact sensitivities of the dry copper derivatives of acetylene, buten-3-yne and l,3-hexadien-5-yne were determined as 2.4, 2.4 and 4.0 kg m, respectively. The copper derivative of a polyacetylene mixture generated by low-temperature polymerisation of acetylene detonated under 1.2 kg m impact. Sensitivities were much lower for the moist compounds [5], Explosive copper and silver derivatives give non-explosive complexes with trimethyl-, tributyl- or triphenyl-phosphine [6], Formation of silver acetylide on silver-containing solders needs higher acetylene and ammonia concentrations than for formation of copper acetylide. Acetylides are always formed on brass and copper or on silver-containing solders in an atmosphere of acetylene derived from calcium carbide (and which contains traces of phosphine). Silver acetylide is a more efficient explosion initiator than copper acetylide [7],... 

TRUEX [TRansUranium Extraction] A process for removing transuranic elements and lanthanide fission products during the processing of nuclear fuel by solvent extraction. The solvent is a complex phosphine oxide mixed with tributyl phosphate and diluted with n-dodecane. By removing the transuranic elements, the alpha activity of the waste is greatly reduced and the residue is easier to dispose of. Developed by E.P. Horwitz at the Argonne National Laboratory, Chicago, IL. See also SREX, UREX+. 

Such experiments show that oxalate, tartrate, and citrate give fairly strong complexes, and indeed these mixtures do not suffer quite such rapid oxidation as the other systems (57, 70). Stability constants for the complexing of U(III) by acetate, 2-hydroxy-2-methylpropionate, nitriloacetate, trans-cyclohexyl-1,2-diaminotetraacetate, ethylenedi-amine tetraacetate, and diethylenetriamine pentaacetate have been reported, but no pure compounds have been isolated (71). Thiocyanate also accelerates oxidation of the uranium, but the blue complex that is formed can be extracted with triethyl phosphate, tributyl phosphate, or better, trioctyl phosphine oxide the organic extract decomposes only slowly (45, 72). 

Numerous additional solution studies on mixed ligand, nitrate complexes have been performed in the development and performance testing of extractants. Most notably these include tributyl-phosphate (TBP) and other phosphine oxides. As other examples, a variety of mixed amide, nitrate complexes have been proposed based upon NMR, IR and extraction behavior. " " The composition and proposed structures of these types of species are described in the sections corresponding to the functionality of the extractant. 

Physiologically, homocysteine exists in reduced, oxidized, and protein-bound forms.Methods for tHcy were first introduced in the midl980s that resolved the problems related to the presence of multiple unstable Hey species in plasma by converting all Hey species into the reduced form, HcyH, which is measured as an indication of tHcy content. Consequently, modern methods require pretreatment of plasma or serum specimens with a reducing agent, such as dithioerythritol, dithiothreitol, mercap-toethanol, tributyl phosphine, and tris(2-carboxyl-ethyl) phosphine that converts all Hey species into the reduced form, HcyH, which is measured as an indication of tHcy content. 

In the presence of hydroxyl ions phosphonium salts decompose preferentially into the phosphine oxide and a hydrocarbon or into the alkylidenephosphor-ane.90 However, (alkoxycarbonylalkyl)phosphonium salts (readily obtained from <%-halo esters and tributyl- or triphenyl-phosphine) decompose when... 

The application of poly(cyclophosphazene) for the potentiometric detection of tributyl phosphate vapour is reported, and the potentiometric determination of some phosphor- amidothioates given. Phosphine and phosphorus oxide concentration measurements with silver(l) p-alumina have also been reported. ... 

Lanthanides Kieselguhr Tributyl phosphate (i) 15.8 mol dm" HNO3 (ii) 15.1 mol dm HNO3 (iii) 11.5moldm HNO (iv) Methylene bis-(di-n-hexyl)-phosphine oxide... 

This chapter presents a summary of the application of TRLIF to study uranium complexation and extraction processes in ScF CO2. The experimental apparatus, methods, synthesis, and relevant safety issues used in this work have been described elsewhere. (24-28) In addition to TBP, the uranyl complexes investigated included the ligands TTA (thenoyltrifluoroacetone), TOPO (trioctyl phosphine oxide), TBPO (tributyl phosphine oxide), HFA (hexafluoroacetylace-tone), and HTFA (trifluoroacetylacetone). 

TBTA. See Tributyltin acetate TBTF. See Tributyltin fluoride TBTO. See Tributyltin oxide TBUP. See Tributyl phosphine 6TB24X. See 6-t-Butyl-2,4-xylenol p-TBX. See Tetrabromo-p-xylene TBZ. See Thiabendazole TCA. See Trichloroacetic acid 1,2,3-TCB. See 1,2,3-Trichlorobenzene 1,2,4,5-TCB. See 1,2,4,5-Tetrachlorobenzene TCBO. See Trichlorobutylene oxide TCC TCC. See 3,4,4 -Trichlorocarbanilide TCCA. See Trichloroisocyanuric acid TCD Ketone A. See Tricycio [5.2.1.0 ] decane-8-one... 

Phenyl acetate p-Quinone dioxime Toluene-2,4-diamine Tributyl phosphine 1,1,3-Triethoxy-3-methoxypropane Triethylene diamine Triethylenemelamine Trimethylolpropane tris-(B-(N-aziridinyl) propionate) Tris [1-(2-methyl-aziridinyl) phosphine oxide] Zinc acetylacetonate Zirconium acetate crosslinking agent, castings PEG-4 dimethacrylate crosslinking agent, coatings PEG-4 dimethacrylate... 

Bis (diisobutylaluminum) oxide 213-649-1 Tripropylsilane 213-650-7 Triethoxysilane 213-651-2 Tributyl phosphine 213-658-0 Diallyl maleate 213-660-1 Neryl butyrate 213-666-4... 

Tributyl and trioctyl phosphine oxides (TBPO and TOPO), important for their metal extraction properties (Chapter 12.11), are made industrially from phosphine and the unsaturated hydrocarbons butene or octene, respectively (6.118). Other industrially important phosphine oxides are TPPO, (C6H5)3P0 and TEPO (C2H5)3PO (Figure 6.3). 

Tributyl and trioctyl phosphine oxides are also available commercially as extractants. The extraction of uranium from wet process phosphoric acid, as U , can be effected with the latter (TOPO) in kerosine. Other processes devised for this purpose are based on commercial octyl pyrophosphoric acid, or the synergistic mixture 2-ethylhexyl phosphoric acid/trioctyl phosphine oxide in kerosine. For extraction of U +, monooctylphenyl/dioctylphenyl phosphoric acids in kerosine can be employed. TOPO can be used for the extraction of Cr, Zr, Ee, Mo and Sn [18] and for making quantum... 

Irving and Edgington found that 1 or 2 nitrates could enter into the complex, depending on the nitric acid concentration. With tributyl phosphine oxide (TBPO) the species identified were M(IV) Tg(NOg)P, M(IV) T2(NOg>2 Pg, and M(ni) Tg (NOg)Pg, whereas with P = TBP they were M(in) TgPg, M(IV) Tg(NOg)P, and M(VI) TgP, where M is an actinide. Thus the complex is influenced by the basic strength of P. These authors postulate that the reaction mechanism for hexavalent species is the replacement of a water molecule in the complex by P, giving a coordinately unsaturated product, thus... 

The forward distribution coefficient of D2EHPA can be increased out of proportion by the addition of relatively small quantities of other organic phosphorus compounds, such as tributyl phosphate or tributyl phosphine oxide, etc. Values of several thousand are obtained at the low uranium concentrations prevailing in ore leach liquors. 

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