Molecular and crystal structures of plutonyl(VI) nitrate complexes with N-alkylated 2-pyrrolidone derivatives: Cocrystallization potentiality of U VI and PuVI

Seong Yun Kim, Koichiro Takao, Yoshinori Haga, Etsuji Yamamoto, Yoshihisa Kawata, Yasuji Morita, Kenji Nishimura, Yasuhisa Ikeda

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13 Citations (Scopus)

Abstract

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(NO 3)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-O NRP bond and the carbonyl group of NRP ≈ 135°. PuO 2(NO3)2(NNpP)2 is isostructural with the corresponding uranium compound, whereas PuO2(NO 3)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.

Original languageEnglish
Pages (from-to)2033-2036
Number of pages4
JournalCrystal Growth and Design
Volume10
Issue number5
DOIs
Publication statusPublished - 2010 May 5

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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