Molecular and Crystal Structures of Plutonyl(VI) Nitrate Complexes with N-Alkylated 2-Pyrrolidone Derivatives: Cocrystallization Potentiality of UVI and PuVI
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- 作者：Seong-Yun Kim ; Koichiro Takao ; Yoshinori Haga ; Etsuji Yamamoto ; Yoshihisa Kawata ; Yasuji Morita ; Kenji Nishimura ; Yasuhisa Ikeda
- 刊名：Crystal Growth & Design
- 出版年：2010
- 出版时间：May 5, 2010
- 年：2010
- 卷：10
- 期：5
- 页码：2033-2036
- 全文大小：806K
- 年卷期：v.10,no.5(May 5, 2010)
- ISSN：1528-7505
文摘
Plutonyl(VI) nitrate complexes with N-cyclohexyl-2-pyrrolidone (NCP) and N-neopentyl-2-pyrrolidone (NNpP) were prepared, and their molecular and crystal structures were determined by single crystal X-ray analysis. The obtained compounds have a similar composition, PuO2(NO3)2(NRP)2 (NRP = NCP, NNpP), which are analogous to the corresponding UVI complexes. Both PuO2(NO3)2(NRP)2 complexes show typical structural properties of actinyl(VI) nitrates, that is, hexagonal-bipyramidal geometry consisting of two NRP molecules and two NO3− ions located in trans positions in the equatorial plane of the PuO22+ moiety, Pu═Oax = 1.73 Å, Pu−ONRP = 2.38 Å, Pu−ONO3 = 2.50 Å, and a bond angle between the Pu−ONRP bond and the carbonyl group of NRP ≈ 135°. PuO2(NO3)2(NNpP)2 is isostructural with the corresponding uranium compound, whereas PuO2(NO3)2(NCP)2 is not. These findings provide one of criteria in selection of suitable NRP as a precipitation agent for the spent nuclear fuel reprocessing based on the precipitation method from a viewpoint of crystal engineering.