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

@article{Kraus2009UF6AU,
  title={UF6 and UF4 in liquid ammonia: [UF7(NH3)]3- and [UF4(NH3)4].},
  author={Florian Kraus and Sebastian A. Baer},
  journal={Chemistry},
  year={2009},
  volume={15 33},
  pages={
          8269-74
        }
}
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… 
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  • F. Kraus
  • Chemistry, Materials Science
    Monatshefte für Chemie - Chemical Monthly
  • 2012
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Organosoluble tetravalent actinide di- and trifluorides.
TLDR
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.
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TLDR
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