Tris uranium chloride reactions

The tris(cyclopentadienyl)thorium-, -uranium- and -plutonium chlorides are best prepared from TlCp in dimethoxyethane Np(Cp- )3Cl is formed in the Be(Cp)2 melt reaction . Analogous complexes containing bromide, iodide and/or indenyl ligands are prepared from K[Cp] or K[indenyl] and the appropriate MX4 compound (see Table 2). 

FIGURE 31.17 Schemes of the highly selective ligand for uranium recovery from seawater, (a) The hexacarboxylate Ugand (b) after reaction with tri-octyl methyl ammonium chloride. (Reproduced from Tabushi, I., Kobuke, Y., Nakayama, N., Aoki, T., and Yashizawa, A., Ind. Eng. Chem. Prod. Res. Dev., 23, 445, 1984. With permission.)... 

Scheme 1 Some reactions of tris (cyclopentadienyl) uranium (IV) chloride...

Reaction of tris-cyclopentadienyluranium(iv) chloride with two moles of Li(CH2)2PPha at — 50 °C affords the first actinide phospho-ylide complex. The new compound forms red, air- and moisture-sensitive crystals whose structure (1) has been determined from an JT-ray study. Two bis(cyclopentadienyl)uranium groups are essentially bridged by the ylide ligand, which is unique in that it also... 

X-ray powder diffraction data reveal that CP3UCI and Cp3ThCl are isomor-phous. Tris(cyclopentadienyl)thorium derivatives of other halides, alkoxides, tetrahydroborates, etc., can be prepared in a manner analogous to the uranium reaction above [58]. Tris(cyclopentadienyl)neptunium chloride, Cp3NpCl, can be prepared either by a radiochemical synthesis [75] ... 

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