Titanium(III) bromide is the

inorganic compound In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...

with the formula TiBr₃. It is a blue black paramagnetic solid with a reddish reflection. It has few applications, although it is a catalyst for the polymerization of alkenes.

Production and structure

TiBr₃ can be produced by heating the tetrabromide in an atmosphere of

hydrogen Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula . It is colorless, odorless, tasteless, non-toxic, an ...

: :2TiBr₄ + H₂ → 2TiBr₃ + 2HBr It can also be produced by

comproportionation Comproportionation or synproportionation is a chemical reaction where two reactants containing the same element but with different oxidation numbers, form a compound having an intermediate oxidation number. It is the opposite of disproportionation. ...

of titanium metal and

titanium tetrabromide Titanium tetrabromide is the chemical compound with the formula TiBr4. It is the most volatile transition metal bromide. The properties of TiBr4 are an average of TiCl4 and TiI4. Some key properties of these four-coordinated Ti(IV) species are ...

. :Ti + 3TiBr₄ → 4TiBr₃ Two polymorphs of TiBr₃ are known, each exhibiting octahedral Ti centers.Troyanov, S. I.; Rybakov, V. B.; Ionov, V. M. "Preparation and crystal structure of titanium tetrabromide, titanium tribromide and titanium(2+) tetrabromoaluminate(1-)" Zhurnal Neorganicheskoi Khimii 1990, vol. 35, 882-7.

Reactions

Heating the tribromide gives

titanium(II) bromide Titanium(II) bromide is the inorganic compound with the formula TiBr2. It is a black micaceous solid. It adopts the cadmium iodide Cadmium iodide is the inorganic compound with the formula CdI2. It is a white hygroscopic solid. It also can b ...

together with the volatile tetrabromide: :2 TiBr₃ → TiBr₄ + TiBr₂ The solid dissolves in donor solvents (L) such as pyridine and nitriles to produce 3:1 adducts: :TiBr₃ + 3 L → 2 TiBr₃L₃

References

{{inorganic bromides Bromides Titanium(III) compounds Titanium halides