Titanium(III) bromide

Titanium(III) bromide
Names
IUPAC name
Tribromotitanium
Other names
Titanium tribromide
Identifiers
13135-31-4
ChemSpider 120705 YesY
PubChem 123104
[1] Properties
TiBr3
Molar mass 287.579 g/mol
Appearance blue-black solid
Hazards
not listed
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g., sodium chloride Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
0
0
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Titanium(III) bromide is the inorganic compound 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:[2]

2 TiBr4 + H2 → 2 TiBr3 + 2 HBr

It can also be produced by comproportionation of titanium metal and titanium tetrabromide.[3]

Ti + 3 TiBr4 → 4 TiBr3

There are two polymorphs, each exhibiting octahedral Ti centers.[3]

Reactions

Heating the tribromide gives the dibromide together with the volatile tetrabromide:[2]

TiBr3 → 2 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

  1. ↑ http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=136975
  2. 1 2 Sherfey, J. M. "Titanium(III) chloride and titanium(III) bromide" Inorganic Syntheses 1960, vol. 6, pp 57-61.
  3. 1 2 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.
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