Tin(IV) bromide

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Tin(IV) bromide
IUPAC name
Other names
tin tetrabromide, stannic bromide, bromostannic acid
3D model (JSmol)
ECHA InfoCard 100.029.258 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 232-184-5
PubChem CID
  • InChI=1S/4BrH.Sn/h4*1H;/q;;;;+4/p-4 X mark.svgN
  • InChI=1/4BrH.Sn/h4*1H;/q;;;;+4/p-4
  • Br[Sn](Br)(Br)Br
Molar mass 438.33 g/mol
Appearancecolourless [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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Tin(IV) bromide is the chemical compound SnBr4. It is a colourless low melting solid. [1]



SnBr4 occurs in form of crystals. The compound crystallises in a monoclinic crystal system with molecular SnBr4 units that have distorted tetrahedral geometry, [2] with mean Sn-Br bond lengths of 242.3 pm. [3]


SnBr4 can be prepared by reaction of the elements at standard temperature and pressure (STP): [4] [ page needed ]

Sn + 2Br

Dissolution in solvents

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+). In basic solution the Sn(OH)62− ion is present. [5]


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. [6]

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