Synthesis and characterization of plutonium(IV), uranium(VI), thorium(IV) and neodymium(III) nitrate complexes with bidentate organophosphorus ligands

Article abstract of DOI:10.1080/00945719809351669

Solid adducts of actinide and lanthanide nitrates of the type [M(NO₃)_n(X)_y], where M = Pu⁴⁺, UO₂²⁺, Th⁴⁺ and Nd³⁺ ; n = 2 for UO₂²⁺, 3 for Nd³⁺ and 4 for Th⁴⁺ and Pu⁴⁺; y = 1 for UO₂²⁺, 1.5 for Th⁴⁺ and 2 for Pu⁴⁺ and Nd³⁺; and X = dihexyl N,N-diethylcarbamoylmethylphosphonate (DHDECMP) or octyl(pnenyl)(N,N-diisobutylcarbamoylmethyl)phosphine oxide (CMPO), were isolated and purified by a solvent extraction route from benzene. These compounds have been characterized by elemental analyses, and their melting points. The IR and visible absorption spectra of these complexes indicate that they are O-bonded. The extractant in all the complexes acts as a bidentate ligand whereas the nitrate ion acts as a bidentate group in the Th⁴⁺, UO₂²⁺ and Nd³⁺ complexes but in the case of the Pu⁴⁺ complexes one of the nitrate ions probably is acting as monodentate ligand. A slight upfield shift of phenyl, methyl and methylene protons around phosphoryl and carbamoyl oxygens in the ¹H NMR spectra of the uranium, thorium and neodymium complexes, as compared to the pure ligand, further reaffirms the bidentate nature of CMPO. Thermal studies of the uranyl and thorium complexes are reported.

Full text of DOI:10.1080/00945719809351669

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Synthesis and Reactivity in
Inorganic and Metal-Organic
Chemistry
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Synthesis and Characterization
of Plutonium(IV), Uranium(VI),
Morium(IV) and Neodymium(III)
Nitrate Complexes with
Bidentate Organophosphorus
Ligands
M. S. Nagar a , P. B. Ruikar a , J. N. Mathur a & R. H.
Lyer a
a Radiochemistry Division, Bhabha Atomic Research
Centre, Trombay, Mumbai, 400 085, India
Version of record first published: 23 Apr 2008.
To cite this article: M. S. Nagar, P. B. Ruikar, J. N. Mathur & R. H. Lyer (1998):
Synthesis and Characterization of Plutonium(IV), Uranium(VI), Morium(IV) and
Neodymium(III) Nitrate Complexes with Bidentate Organophosphorus Ligands,
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 28:4, 621-636
To link to this article: http://dx.doi.org/10.1080/00945719809351669
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