Tin(IV) bromide


Tin(IV) bromide
IUPAC name
Other names
tin tetrabromide, stannic bromide, bromostannic acid
  • 7789-67-5 checkY
3D model (JSmol)
  • Interactive image
  • 23018 ☒N
ECHA InfoCard 100.029.258 Edit this at Wikidata
EC Number
  • 232-184-5
  • 24616
  • 23C21BW281 checkY
  • DTXSID1064873 Edit this at Wikidata
  • InChI=1S/4BrH.Sn/h4*1H;/q;;;;+4/p-4 ☒N
  • InChI=1/4BrH.Sn/h4*1H;/q;;;;+4/p-4
  • Br[Sn](Br)(Br)Br
Molar mass 438.33 g/mol
Appearance colourless [1]
Density 3.340 g/cm3 (at 35 °C)[1]
Melting point 31 °C (88 °F; 304 K)[1]
Boiling point 205 °C (401 °F; 478 K)[1]
−149.0·10−6 cm3/mol
Related compounds
Other anions
Tin(IV) fluoride
Tin(IV) chloride
Tin(IV) iodide
Other cations
Carbon tetrabromide
Silicon tetrabromide
Germanium tetrabromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Tin(IV) bromide is the chemical compound SnBr4. It is a colourless low melting solid.[1] SnBr4 can be prepared by reaction of the elements at normal temperatures:[2]

Sn + 2Br2 → SnBr4

In aqueous solution Sn(H2O)64+ is the principal ionic species amongst a range of 6 coordinate ions with from 0-6 bromide ligands (e.g. Sn(H2O)64+, SnBr(H2O)53+)[3] In basic solution the Sn(OH)62− ion is present.[3]
SnBr4 forms 1:1 and 1:2 complexes with ligands, e.g. with trimethylphosphine the following can be produced, SnBr4.P(CH3)3 and SnBr4.2P(CH3)3.[4]
SnBr4 crystallises in a monoclinic form with molecular SnBr4 units that have distorted tetrahedral geometry.[5]


  1. ^ a b c d e Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. ^ Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5
  3. ^ a b Sn NMR and vibrational spectroscopy, Taylor M. J. ; Coddington J. M., Polyhedron 1992, 11, 12, 1531-1544, doi:10.1016/S0277-5387(00)83148-4
  4. ^ Preparation, Infrared and Raman Spectra, and Stereochemistries of Pentacoordinate Trimethylphosphine Complexes, MX4•P(CH3)3 and MX4•P(CD3)3 where M = Ge or Sn and X = Cl or Br, Frieson D. K., Ozin G. A., Can. J. Chem. 51(16): 2697–2709 (1973) doi:10.1139/v73-406
  5. ^ Die Kristallstruktur von SnBr4 , Brand P., Sackmann H., Acta Crystallographica ( 1963), 16, 446-451, doi:10.1107/S0365110X63001250