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
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.349 Edit this at Wikidata
EC Number
  • 236-699-6
  • InChI=1S/3BrH.Sc/h3*1H;/q;;;+3/p-3
    Key: APPHYFNIXVIIJR-UHFFFAOYSA-K
  • Br[Sc](Br)Br
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)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
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).

Preparation and properties

edit

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

edit

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

edit
  1. ^ Steinwand, S.J. et al. Inorg. Chem. 36, 6413, (1997)
  2. ^ "Scandium tribromide".
  3. ^ "Scandium Bromide".
  4. ^ "WebElements Periodic Table » Scandium » reactions of elements".
  5. ^ Petrů, F.; Kůtek, F. (1960). "Beiträge zur Chemie seltener Elemente X. Basische Scandiumhalogenide". Collection of Czechoslovak Chemical Communications. 25 (4): 1143–1147. doi:10.1135/cccc19601143. ISSN 1212-6950.
  6. ^ Reid, Allen Forrest; Wadsley, Arthur D.; Sienko, Michell J. (Jan 1968). "Crystal chemistry of sodium scandium titanate, NaScTiO4, and its isomorphs". Inorganic Chemistry. 7 (1): 112–118. doi:10.1021/ic50059a024. ISSN 0020-1669.
  7. ^ Meyer, Gerd; Dötsch, Siegfried; Staffel, Thomas (1987-01-01). "The ammonium-bromide route to anhydrous rare earth bromides MBr3". Journal of the Less Common Metals. 127: 155–160. doi:10.1016/0022-5088(87)90372-9. ISSN 0022-5088.
  8. ^ "Scandium(III) bromide | CAS 13465-59-3".