Chemistry:Scandium bromide

From HandWiki
Scandium(III) bromide
Names
IUPAC name
Tribromoscandium
Other names
Scandium tribromide
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 236-699-6
Properties
ScBr3
Molar mass 284.67 g/mol
Appearance anhydrous powder
Density 3.914 g/cm3
Melting point 904 °C (1,659 °F; 1,177 K)[1][2][3]
soluble
Solubility soluble in ethanol
Thermochemistry
-2.455 kJ/g
Hazards
NFPA 704 (fire diamond)
Flammability code 0: Will not burn. E.g. waterHealth code 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
0
0
0
Related compounds
Other anions
Scandium fluoride
Scandium chloride
Scandium triiodide
Other cations
Yttrium(III) bromide
Lutetium(III) bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Scandium bromide, or ScBr3, is a trihalide, hygroscopic, water-soluble chemical compound of scandium and bromine.

Preparation and properties

ScBr3 is produced through the burning of scandium in bromine gas.[4]

2 Sc(s) + 3 Br2(g) → 2 ScBr3(s)

Scandium bromide can also be prepared by reacting excess hydrobromic acid with scandium oxide, and the hexahydrate can be crystallized from the solution. The thermal decomposition of hexahydrate can only yield scandium oxybromide (ScOBr) and scandium oxide.[5] The anhydrous form can be produced by the reaction of bromine, scandium oxide and graphite in nitrogen gas.[6]

Heating reaction between ammonium bromide and scandium oxide or scandium bromide hexahydrate, through (NH4)3ScBr6 intermediate, decomposes to obtain anhydrous scandium bromide.[7]

Uses

Scandium bromide is used for solid state synthesis of unusual clusters such as Sc19Br28Z4, (Z=Mn, Fe, Os or Ru). These clusters are of interest for their structure and magnetic properties.[8]

References