Scandium bromide

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

Scandium(III) bromide

Names
IUPAC name Tribromoscandium
Other names Scandium tribromide
Identifiers
CAS Number	13465-59-3
3D model (JSmol)	Interactive image
ChemSpider	75332 Y
ECHA InfoCard	100.033.349
EC Number	236-699-6
PubChem CID	83495
CompTox Dashboard (EPA)	DTXSID0065486
InChI InChI=1S/3BrH.Sc/h3*1H;/q;;;+3/p-3 Key: APPHYFNIXVIIJR-UHFFFAOYSA-K
SMILES Br[Sc](Br)Br
Properties
Chemical formula	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]
Solubility in water	soluble
Solubility	soluble in ethanol
Thermochemistry
Std enthalpy of formation (ΔfH⦵298)	−2.455 kJ/g
Hazards
NFPA 704 (fire 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

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]