Tin(IV) bromide is the
chemical compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element ...
SnBr
4. It is a
colourless low melting solid.
SnBr
4 can be prepared by reaction of the elements at normal temperatures:
:Sn + 2Br
2 → SnBr
4
In
aqueous solution
An aqueous solution is a solution in which the solvent is water. It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula. For example, a solution of table salt, or sodium chloride (NaCl), in water would be re ...
Sn(H
2O)
64+ is the principal ionic species amongst a range of 6 coordinate ions with from 0-6 bromide ligands (e.g. Sn(H
2O)
64+, SnBr(H
2O)
53+); in basic solution the Sn(OH)
62− ion is present.
SnBr
4 forms 1:1 and 1:2 complexes with
ligand
In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex. The bonding with the metal generally involves formal donation of one or more of the ligand's electr ...
s, e.g. with
trimethylphosphine
Trimethylphosphine is a neutral organophosphorus compound with the formula P(CH3)3, commonly abbreviated as PMe3. This colorless liquid has a strongly unpleasant odor, characteristic of alkylphosphines. The compound is a common ligand in coordin ...
the following can be produced, SnBr
4.P(CH
3)
3 and SnBr
4.2P(CH
3)
3.
SnBr
4 crystallises in a
monoclinic form with molecular SnBr
4 units that have distorted tetrahedral geometry, with mean Sn-Br bond lengths of 242.3 pm.
References
{{DEFAULTSORT:Tin(Iv) Bromide
Bromides
Metal halides
Tin(IV) compounds