Titanium(III) bromide

Titanium(III) bromide
Names
	IUPAC name Titanium(III) bromide
	Other names Titanium tribromide ; Tribromotitanium
Identifiers
CAS Number	13135-31-4;
3D model (JSmol)	Interactive image;
ChemSpider	120705 ;
PubChem CID	136975;
CompTox Dashboard (EPA)	DTXSID601045966 ;
	InChI InChI=1S/3BrH.Ti/h3*1H;/q;;;+3/p-3 Key: MTAYDNKNMILFOK-UHFFFAOYSA-K;
	SMILES [Ti](Br)(Br)Br;
Properties
Chemical formula	TiBr3
Molar mass	287.579 g/mol
Appearance	blue-black solid
Hazards
NFPA 704 (fire diamond)	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). 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:^[3]

2 TiBr₄ + H₂ → 2 TiBr₃ + 2 HBr

It can also be produced by comproportionation of titanium metal and titanium tetrabromide.^[4]^[5]

Ti + 3 TiBr₄ → 4 TiBr₃

Two polymorphs of TiBr₃ are known, each exhibiting octahedral Ti centers.^[4]

Reactions

Heating the tribromide gives titanium(II) bromide together with the volatile tetrabromide:^[3]

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

^ "Titanium(III) bromide".
^ "WebElements Periodic Table » Titanium » titanium tribromide".
^ ^a ^b 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.
^ ^a ^b 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.
^ 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.

[1] "Titanium(III) bromide".

[2] "WebElements Periodic Table » Titanium » titanium tribromide".

[Sherfey-3] 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.

[Troy-4] 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.

[3]