Titanium(III) bromide

Titanium(III) bromide
Names
IUPAC name
Titanium(III) bromide
Other names
Titanium tribromide
Tribromotitanium
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/3BrH.Ti/h3*1H;/q;;;+3/p-3
    Key: MTAYDNKNMILFOK-UHFFFAOYSA-K
  • [Ti](Br)(Br)Br
Properties
TiBr3
Molar mass 287.579 g/mol
Appearance blue-black solid
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
0
0
Related compounds
Other anions
 Titanium(III) chloride
Titanium(III) fluoride
Related compounds
 Titanium(IV) bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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 TiBr4 + H2 → 2 TiBr3 + 2 HBr

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

Ti + 3 TiBr4 → 4 TiBr3

Two polymorphs of TiBr3 are known, each exhibiting octahedral Ti centers.

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

  1. "Titanium(III) bromide".
  2. "WebElements Periodic Table » Titanium » titanium tribromide".
  3. 1 2 Sherfey, J. M. (1960). "Titanium(III) Chloride and Titanium(III) Bromide". Inorganic Syntheses. Vol. 6. pp. 57–61. doi:10.1002/9780470132371.ch17. ISBN 978-0-470-13237-1. {{cite book}}: ISBN / Date incompatibility (help)
  4. 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.
  5. ↑ Stebler, Anton; Leuenberger, Bruno; Güdel, Hans U. (1989). "Synthesis and Crystal Growth of A 3 M 2 X 9 (A = Cs, Rb; M = Ti, V, Cr; X = Cl, Br)". Inorganic Syntheses. Vol. 26. pp. 377–385. doi:10.1002/9780470132579.ch69. ISBN 978-0-470-13257-9.