Molecular and crystal structure of bis(N-cyclohexyl-2-pyrrolidone)dioxouranium(VI) nitrate

Varga, Tamás; Bényei, Attila; Fazekas, Zsolt; Tomiyasu, Hiroshi; Ikeda, Yasuhisa

doi:10.1016/s0020-1693(02)01162-3

Cited by 45 publications

(57 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Introductionmentioning

confidence: 99%

“…1) The resulting precipitate has a formula of UO 2 (NO 3 ) 2 (NCP) 2 , where trans coordination of two NO À 3 ions and two NCP ligands to U is formed in the equatorial plane of UO 2þ 2 . 2) We also reported the selectivity of the precipitation phenomenon of U(VI) to other metal ions. 3) Furthermore, the capabilities of other 2-pyrrolidone derivatives (NRPs) with the alkyl chain (R = methyl, ethyl, nbutyl, and cyclohexylmethyl) were investigated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Solubility of Uranyl Nitrate Precipitates withN-Alkyl-2-pyrrolidone Derivatives (Alkyl =n-Propyl,n-Butyl,iso-Butyl, and Cyclohexyl)

Kohara

Noda

Nogami

et al. 2009

Journal of Nuclear Science and Technology

Self Cite

View full text Add to dashboard Cite

The solubility of UO 2 (NO 3 ) 2 (NRP) 2 (NRP = N-alkyl-2-pyrrolidone) in aqueous solutions with HNO 3 (0-5.0 M) and the corresponding NRP (0-0.50 M) has been studied. As a result, the solubility of each species of UO 2 (NO 3 ) 2 (NRP) 2 generally decreases with increasing concentrations of HNO 3 and the corresponding NRP (C HNO 3 and C NRP , respectively) in the supernatant. The solubility of UO 2 (NO 3 ) 2 (NRP) 2 also depends on the type of NRP; a higher hydrophobicity of NRP generally leads to a lower solubility of UO 2 (NO 3 ) 2 (NRP) 2 . The logarithms of effective solubility products (K eff ) of

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solubility of Uranyl Nitrate Precipitates withN-Alkyl-2-pyrrolidone Derivatives (Alkyl =n-Propyl,n-Butyl,iso-Butyl, and Cyclohexyl)

Kohara

Noda

Nogami

et al. 2009

Journal of Nuclear Science and Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…These results suggest that the chemical form of the uranyl species in Extrac-U is similar to that in CH 2 Cl 2 -U, and that in such uranyl species, NRP coordinates to the equatorial plane of the uranyl moiety through their carbonyl oxygen as well as NRP in Solid-U. 25,26) In conclusion, it is proposed that the extraction equilibrium in the present study is expressed using Eq. (5) and the extracted U(VI) species exist as UO 2 (NO 3 ) 2 (NRP) 2 .…”

Section: Extraction Equilibrium Of U(vi)mentioning

confidence: 50%

“…The obtained crystals were filtered and washed with cold ethanol and hexane, followed by air-drying. [25][26][27][28][29]32) …”

Section: Syntheses Of Uomentioning

confidence: 99%

See 1 more Smart Citation

Extraction of Uranium(VI) from Nitric Acid Solution Using Pyrrolidone Derivatives

Takahashi¹,

Hotokezaka²,

Noda³

et al. 2009

Journal of Nuclear Science and Technology

Self Cite

View full text Add to dashboard Cite

The extraction behavior of uranyl species from HNO 3 aqueous solutions using CH 2 Cl 2 containing pyrrolidone derivatives as extractants has been studied to find an alternative to tributyl phosphate as an extractant. In this study, we used N-cyclohexyl-2-pyrrolidone (NCP), N-octyl-2-pyrrolidone (NOP), and N-dodecyl-2-pyrrolidone (NDP) as the extractants. As a result, it was found that NCP, NOP, and NDP (abbreviated as NRP) extract U(VI) as UO 2 (NO 3 ) 2 (NRP) 2 , that a part of NCP in CH 2 Cl 2 phase is moved to the aqueous phase, and that the extractability (corresponding distribution ratio) of U(VI) increases with increasing [HNO 3 ] int from 7% (0.08) (½HNO 3 int ¼ 0:1 M, ½NRP int ¼ 1:0 M) to more than 90% (11) (½HNO 3 int ¼ 3:0 M, ½NRP int ¼ 1:0 M). From these results, it is expected that NOP and NDP extract U(VI) effectively from HNO 3 solution of more than 3 M and that the extracted U(VI) species are stripped by using HNO 3 aqueous solution of low concentration.

show abstract

Competing Crystallization between Lanthanide and Actinide in Acidic Solution Leading to Their Efficient Separation

Yin

Wang

et al. 2018

Chin. J. Chem.

View full text Add to dashboard Cite

of main observation and conclusion We present a new method for generating europium oxalate compounds by decomposing of N-methyl 2-pyrrolidone in HNO 3 media. The reaction exhibits high selectivity towards Eu 3+ over UO 2 2+ , which suggests that these conditions could be applied to a selective crystallization based separation system for trivalent lanthanides and hexavalent actinides.www.cjc.wiley-vch.de

show abstract

Molecular and crystal structure of bis(N-cyclohexyl-2-pyrrolidone)dioxouranium(VI) nitrate

Cited by 45 publications

References 7 publications

Solubility of Uranyl Nitrate Precipitates withN-Alkyl-2-pyrrolidone Derivatives (Alkyl =n-Propyl,n-Butyl,iso-Butyl, and Cyclohexyl)

Solubility of Uranyl Nitrate Precipitates withN-Alkyl-2-pyrrolidone Derivatives (Alkyl =n-Propyl,n-Butyl,iso-Butyl, and Cyclohexyl)

Extraction of Uranium(VI) from Nitric Acid Solution Using Pyrrolidone Derivatives

Competing Crystallization between Lanthanide and Actinide in Acidic Solution Leading to Their Efficient Separation

Contact Info

Product

Resources

About