Tin(IV) bromide

Tin(IV) bromide is the chemical compound SnBr4. It is a colourless low melting solid.

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

Preparation
SnBr4 can be prepared by reaction of the elements at standard temperature and pressure (STP):
 * + 2 →

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.

Reactions
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.