UF6 and UF4 in liquid ammonia: [UF7(NH3)]3- and [UF4(NH3)4].

  title={UF6 and UF4 in liquid ammonia: [UF7(NH3)]3- and [UF4(NH3)4].},
  author={Florian Kraus and Sebastian A. Baer},
  volume={15 33},
From the reaction of uranium hexafluoride UF6 with dry liquid ammonia, the [UF7(NH3)]3- anion and the [UF4(NH3)4] molecule were isolated and identified for the first time. They are found in signal-green crystals of trisammonium monoammine heptafluorouranate(IV) ammonia (1:1; [NH4]3[UF7(NH3)].NH3) and emerald-green crystals of tetraammine tetrafluorouranium(IV) ammonia (1:1; [UF4(NH3)4].NH3). [NH4]3[UF7(NH3)].NH3 features discrete [UF7(NH3)]3- anions with a coordination geometry similar to a… 
Uranyl Halides from Liquid Ammonia: [UO2(NH3)5]Cl2·NH3 and [UO2F2(NH3)3]2·2NH3 and Their Decomposition Products [UO2Cl2(NH3)3] and [UO2F2(NH3)3]
Uranyl chloride UO2Cl2 and uranyl fluoride UO2F2 react with dry liquid ammonia under the formation of traffic-green crystals of pentaammine dioxido uranium(VI) dichloride ammonia (1/1)
The reactions of TiCl3, and of UF4 with TiCl3 in liquid ammonia: unusual coordination spheres in [Ti(NH3)8]Cl3·6NH3 and [UF(NH3)8]Cl3·3.5NH3.
TiCl3 and NH3 form octaammine titanium(III) chloride ammonia (1/6), [Ti(NH3)8]Cl3·6NH3, which is the first structurally characterized octaammine complex of a transition metal. An excess of TiCl3
Dissolving the insoluble: CdF2 and moist ammonia form cadmium(II) difluoride monohydrate—synthesis and crystal structure of [Cd(NH3)6]F2·H2O
  • F. Kraus
  • Chemistry, Materials Science
    Monatshefte für Chemie - Chemical Monthly
  • 2012
Hexaamminecadmium(II) fluoride monohydrate (1:1) [Cd(NH3)6]F2·H2O was synthesized from CdF2 and liquid ammonia in open reaction vessels, so that moisture from the air was in contact with the solvent.
Higher Ammoniates of BF3 and SiF4: Syntheses, Crystal Structures, and Theoretical Calculations
We report on the synthesis and crystal structure of a higher ammoniate of BF3NH3, the monammine trifluorido boron(III) ammonia (1/3), [BF3NH3]·3NH3. The neutral compound crystallizes in the
The Complex Amide K2[Zr(NH2)6]
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The pyrophoric compound Rb2[U(NH2)6] was obtained as a grey to black powder from the reaction of more than three equivalents of RbNH2 with UI3 in anhydrous liquid ammonia. During the process, UIII is
Crystal structure of [UO2(NH3)5]NO3·NH3
The title compound, [UO2(NH3)5]NO3·NH3, contains a pentagonal–bipyramidal [UO2(NH3)5]+ cation, a nitrate anion and an ammonia molecule of crystallization.
Recent advances in the chemistry of uranium halides in anhydrous ammonia
Abstract This article presents an overview of recent advancements in the field of uranium chemistry, paying special attention to the preparation of starting materials and to the chemistry of uranium
Reactions of ThX 4 (X=F, Cl, Br, I) with Liquid Ammonia‐Crystal Structures and a Theoretical Study of Ammine Thorium(IV) Halide Ammoniates
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Organosoluble tetravalent actinide di- and trifluorides.
Two compounds, ( py)4UF2I2·2py and (py)7Th2F5(SC6F5)3·2Py were isolated and characterized by conventional methods, powder and low temperature single crystal X-ray diffraction.


The Reactions of Silver, Zirconium, and Hafnium Fluorides with Liquid Ammonia: Syntheses and Crystal Structures of Ag(NH3)2F·2NH3, [M(NH3)4F4]·NH3 (M = Zr, Hf), and (N2H7)F
By reaction of the tetrafluorides MF4 or the ternary silver fluorides Ag3M2F14 (M = Zr, Hf) with dry liquid ammonia at –40 °C, the pentaammoniates [M(NH3)4F4]·NH3 (1, M = Zr; 2, M = Hf) were
Analysis of uranium azide and nitride complexes by atmospheric pressure chemical ionization mass spectrometry.
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X-ray and neutron diffraction investigation at 298 K of NH4I · NH3 and ND4I · ND3 containing the cation H3N – H … NH3+ and D3N – D … ND3+
NH 4 I . NH 3 = N 2 H 7 I and ND 4 I . ND 3 = N 2 D 7 I both crystallize at room temperature in the cubic space group Pm3m (Z = 1) with a = 512.9(3) pm and a = 513.4(1) pm. The primitive unit cells
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The oxidative ammonolysis route was used to synthesize three uranium nitrides, UN2, U2N3, and UN, using UF4 as the starting material. Powder XRD analysis showed the UN2 and U2N3 products to contain
Molecular Octa-Uranium Rings with Alternating Nitride and Azide Bridges
Uranium nitrides offer potential as future nuclear fuels and as probes of metal ligand multiple bonding involving the f-block actinide metals. However, few molecular examples are available for study
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Both the GGA DFT and MP2 MO methods show overbinding of these bonds; moreover, this overbinding was found to be not uniform but strongly dependent on the coordination environment of the uranium atom in each case.
Why are hexavalent uranium cyanides rare while U–F and U–O bonds are common and short?
Relativistic small-core pseudopotential B3LYP and CCSD(T) calculations and frozen-core PW91–PW91 studies are reported for the series UF4X2 (X=H, F, Cl, CN, NC, NCO, OCN, NCS and SCN). The bonding in
Density functional investigations of the properties and thermochemistry of UFn and UCln (n=1,...,6).
For the first time Bond dissociation energies for this whole series are computed and shown to be in good agreement with experiment.