Molecular and crystal structures of uranyl nitrate complexes with -alkylated 2-pyrrolidone derivatives; Design and optimization of promising precipitant for uranyl ion

Takao, Koichiro*; Noda, Kyoko*; Morita, Yasuji ; Nishimura, Kenji*; Ikeda, Yasuhisa*

Molecular and crystal structures of UO $_{2}$ (NO $_{3}$ ) $_{2}$ (NRP) $_{2}$ (NRP = N-alkylated 2-pyrrolidone derivative) have been investigated by using single crystal X-ray analysis, IR and Raman spectroscopies. All UO $_{2}$ (NO $_{3}$ ) $_{2}$ (NRP) $_{2}$ complexes have typical structural properties of UO $_{2}$ (NO $_{3}$ ) $_{2}$ (L) $_{2}$ (L = unidentate ligand), i.e., hexagonal-bipyramidal geometry, two NRP and two NO $_{3}$ $^{-}$ located in trans positions in an equatorial plane of the uranyl ion. Observation of the crystals of the uranyl nitrate complexes with N-n-propyl-2-pyrrolidone and N-iso-propyl-2-pyrrolidone indicate the presence of significant voids in the crystal lattices of these compounds. From this result, an approach for construction of efficient packing of UO $_{2}$ (NO $_{3}$ ) $_{2}$ (NRP) $_{2}$ was proposed. Consequently, it was found that N-iso-butyl-2-pyrrolidone completely satisfies with the requirement for the efficient packing by filling the voids with the alkyl chain.

Language	:	English
Journal	:	Crystal Growth & Design
Volume	:	8
Number	:	7
Pages	:	p.2364 - 2376
Publication Year/Month	:	2008/07
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Paper URL	:	https://doi.org/10.1021/cg7012254
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Keywords	:	no keyword
Research Facility	:	BECKY(バックエンド研究施設)
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Article of JAEA R&D Review	:
Cooperating Institute	:	東京工業大学(文部科学省)

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Registration No. : AA20070731
JAEA Abstracts No. : 37000015
Paper Submission No. : 4981

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