Uranium Tetrabromide

uranium (IV) bromide

  • Formula as commonly written: UBr4
  • Hill system formula: Br4U1
  • CAS registry number: [13470-20-7]
  • Formula weight: 557.645
  • Class: bromide

Synonyms

  • uranium (IV) bromide
  • uranium bromide
  • uranium tetrabromide

Physical properties

  • Colour: brown
  • Appearance: crystalline solid
  • Melting point: 519°C
  • Boiling point: 791°C
  • Density: 5190 kg m-3

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Element analysis and oxidation numbers

For each compound, and where possible, a formal oxidation number for each element is given, but the usefulness of this number is limited, especially so for p-block elements in particular. Based upon that oxidation number, an electronic configuration is also given but note that for more exotic compounds you should view this as a guide only.

Element % Formal oxidation state Formal electronic configuration
Br 57.32 -1 [Ar].3d10.4s2.4p6
U 42.68 4 [Rn].5f2

Synthesis

Not available

Solid state structure

  • Geometry of uranium: 7 coordinate: pentagonal bipyramidal
  • Prototypical structure:

Isotope pattern

What follows is the calculated isotope pattern for the UBr4 unit with the most intense ion set to 100%. Formula: U1Br4 mass  %550   0.0 551   0.1 552   0.0 553   0.5 554  17.6 555   0.7 556  68.5 557   0.5 558 100.0 559   0.1 560  64.8 561   0.0 562  15.8

uranium_tetrabromide

 

 

 

 

 

 

 

 

 

 

 

 

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