Tin bromide is the chemical compound

Chemical compound

A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Chemical compounds have a unique and defined chemical structure; they consist of a fixed ratio of atoms that are held together...

 SnBr₄. It is a colourless

Colourless

Colourless may also refer to:* Transparency and translucency, transmitting all or most colours** Neutral density filter, a colorless or grey filter that changes intensity of all wavelengths of light equally* Monochrome, images in a single colour...

 low melting solid.
SnBr₄ can be prepared by reaction of the elements at normal temperatures:

Sn + 2Br₂ → SnBr₄

In aqueous solution

Aqueous solution

An aqueous solution is a solution in which the solvent is water. It is usually shown in chemical equations by appending aq to the relevant formula, such as NaCl. The word aqueous means pertaining to, related to, similar to, or dissolved in water...

 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⁺ etc. In basic solution the Sn(OH)₆²⁻ ion is present.

SnBr₄ forms 1:1 and 1:2 complexes with ligand

Ligand

In coordination chemistry, a ligand is an ion or molecule that binds to a central metal atom to form a coordination complex. The bonding between metal and ligand generally involves formal donation of one or more of the ligand's electron pairs. The nature of metal-ligand bonding can range from...

s, e.g. with trimethylphosphine

Trimethylphosphine

Trimethylphosphine is the organophosphorus compound with the formula P3, commonly abbreviated PMe3. This colorless liquid has a strongly unpleasant odour, which is characteristic of alkylphosphines. It is a pyramidal molecule with C3v symmetry, similar to ammonia and phosphine . As a ligand, its...

 the following can be produced, SnBr₄.P(CH₃)₃ and SnBr₄.2P(CH₃)₃.

SnBr₄ crystallises in a monoclinic form

Monoclinic crystal system

In crystallography, the monoclinic crystal system is one of the 7 lattice point groups. A crystal system is described by three vectors. In the monoclinic system, the crystal is described by vectors of unequal length, as in the orthorhombic system. They form a rectangular prism with a...

with molecular SnBr₄ units that have distorted tetrahedral geometry.