Titanium(III) bromide is the
inorganic compound
An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as ''inorganic chemistry''.
Inorgan ...
with the formula TiBr
3. 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
TiBr
3 can be produced by heating the tetrabromide in an atmosphere of
hydrogen
Hydrogen is a chemical element; it has chemical symbol, symbol H and atomic number 1. It is the lightest and abundance of the chemical elements, most abundant chemical element in the universe, constituting about 75% of all baryon, normal matter ...
:
:2TiBr
4 + H
2 → 2TiBr
3 + 2HBr
It can also be produced by
comproportionation
Comproportionation or symproportionation 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 disproportionatio ...
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 ...
.
[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 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 → TiBr3L3
]
References
{{inorganic bromides
Bromides
Titanium(III) compounds
Titanium halides