Bis(2-methylimidazolium) tetrachlorodioxouranate(VI), 2C4H7N2+.UCl4O22−

Zalkin, A.; Perry, Dale C.; Tsao, Leon; Zhang, D.

doi:10.1107/s0108270183007854

Cited by 12 publications

(18 citation statements)

References 4 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crystal structures of seven compounds containing uranyl tetrachloride have been determined. While there are several previous papers that describe the structural chemistry of the [UO 2 Cl 4 ] 2À unit with various cationic species, including Group 1 and 2 metals, 18 crown ether complexs, 13,15,[19][20][21] organic ammonium, 22 imidazolium, 23,24 and phosphonium 25 cations, and others, [26][27][28] this moiety has not been exploited from a crystal engineering perspective. This work includes seven examples of organic cations, seen in Scheme 2, which can be divided into ''linear'' (1-4) and ''non-linear'' (5-7) sub-types based on the relative position of their cationic nitrogen centers with respect to one another.…”

Section: Resultsmentioning

confidence: 99%

The uranyl tetrachloride anion as a tecton in the assembly of U(VI) hybrid materials

Deifel

Cahill

2009

CrystEngComm

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

The uranyl tetrachloride anion as a tecton in the assembly of U(VI) hybrid materials

Deifel

Cahill

2009

CrystEngComm

View full text Add to dashboard Cite

“…In all cases, they were surrounded by solvent anions, with the contribution of the Cl − anions dominating in the basic melts. In the two basic liquids, there is a strong tendency for the UO 2 2+ ion to form the “saturated” [UO 2 Cl 4 ] 2− complex, which is commonly found in solid‐state structures of imidazolium salts57, 58 and in ionic liquid solutions 4. 59–64 According to our simulations in solution, this complex is stable and interacts more strongly with the ionic liquids than the mixed complexes do (e.g., [UO 2 Cl 3 (tca)] 2− ).…”

Section: Discussionmentioning

confidence: 99%

Solvation of Uranyl(II), Europium(III) and Europium(II) Cations in “Basic” Room‐Temperature Ionic Liquids: A Theoretical Study

Chaumont

Wipff

2004

Chemistry A European J

View full text Add to dashboard Cite

We report a molecular dynamics study of the solvation of UO2(2+), Eu3+ and Eu2+ ions in two "basic" (Lewis acidity) room-temperature ionic liquids (IL) composed of the 1-ethyl-3-methylimidazolium cation (EMI+) and a mixture of AlCl4- and Cl- anions, in which the Cl-/AlCl4- ratio is about 1 and 3, respectively. The study reveals the importance of the [UO2Cl4]2- species, which spontaneously form during most simulations, and that the first solvation shell of europium is filled with Cl- and AlCl4- ions embedded in a cationic EMI+ shell. The stability of the [UO2Cl4]2- and [Eu(III)Cl6]3- complexes is supported by quantum mechanical calculations, according to which the uranyl and europium cations intrinsically prefer Cl- to the AlCl4- ion. In the gas phase, however, [Eu(III)Cl6]3- and [Eu(II)Cl6]4- complexes are predicted to be metastable and to lose two to three Cl- ions. This contrasts with the results of simulations of complexes in ILs, in which the "solvation" of the europium complexes increases with the number of coordinated chlorides, leading to an equilibrium between different chloro species. The behavior of the hydrated [Eu(OH2)8]3+ complex is considered in the basic liquids; the complex exchanges H2O molecules with Cl- ions to form mixed [EuCl3(OH2)4] and [EuCl4(OH2)3]- complexes. The results of the simulations allow us to better understand the microscopic nature and solvation of lanthanide and actinide complexes in "basic" ionic liquids.

show abstract

“…The solid state compounds isolated typically consist of negatively charged uranium species (mononuclear or dinuclear) charge balanced by imidazolium cations. [8,9] Norquist et al, [10] reacted UO 2 SO 4 (propylamine) 2 with neutral imidazole which resulted in the formation of an anionic uranyl sulfate coordination polymer, [(UO 2 )(SO 4 ) 3 ] n [HIm] 2n where the protonated imidazolium cations charge balance the anion. Also a few other examples of neutral uranyl complexes crystallized with neutral imidazoles have been reported.…”

Section: Introductionmentioning

confidence: 99%

Crystallization of Uranyl Salts from Dialkylimidazolium Ionic Liquids or Their Precursors

et al. 2010

View full text Add to dashboard Cite

The interaction of uranyl nitrate hexahydrate with three ionic liquids and one ionic liquid precursor with minimal solvent addition led to the isolation and crystallographic characterization of four new uranyl salts: bis(1,3‐dimethylimidazolium) bis‐μ‐hydroxo‐bis[bis(nitrato‐O,O)dioxouranate(VI)], bis(1‐ethyl‐3‐methylimidazolium) bis‐μ‐hydroxo‐bis[bis(nitrato‐O,O)dioxouranate(VI)], bis(1,2,3‐trimethylimidazolium) bis‐μ‐hydroxo‐bis[bis(nitrato‐O,O)dioxouranate(VI)], and bis(1‐ethyl‐3‐methylimidazolium) trichlorobis(nitrato‐O,O)dioxouranate(VI). Each ion in the four isolated salts has precedence in the crystallographic literature, although the exact combinations of ions we observe in these salts are new. Some interesting differences in the packing of the ions can be related to the lack of an acidic C2‐H ring hydrogen atom in the 1,2,3‐trimethylimidazolium cation. It is suggested that future studies of these reactions be carried out under more strictly anhydrous conditions.

show abstract

Bis(2-methylimidazolium) tetrachlorodioxouranate(VI), 2C4H7N2+.UCl4O22−

Abstract: Abstract. M r = 578-07, monoclinic, P2Jc, a =

Cited by 12 publications

References 4 publications

The uranyl tetrachloride anion as a tecton in the assembly of U(VI) hybrid materials

The uranyl tetrachloride anion as a tecton in the assembly of U(VI) hybrid materials

Solvation of Uranyl(II), Europium(III) and Europium(II) Cations in “Basic” Room‐Temperature Ionic Liquids: A Theoretical Study

Crystallization of Uranyl Salts from Dialkylimidazolium Ionic Liquids or Their Precursors

Contact Info

Product

Resources

About