Titanium (IV) bromide

Structural formula
General
Surname	Titanium (IV) bromide
other names	Titanium tetrabromide
Molecular formula	TiBr 4
Brief description	amber solid
External identifiers / databases
EC number	232-185-0
ECHA InfoCard	100.029.259
PubChem	123263
Wikidata	Q411616
properties
Molar mass	367.48 g mol −1
Physical state	firmly
density	3.25 g cm −3 (25 ° C)
Melting point	38-40 ° C
boiling point	230 ° C
solubility	reacts with water; very easily soluble in alcohol; sparingly soluble in ether; soluble in 34% hydrobromic acid and in concentrated hydrochloric acid ;
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 314
	P: 280-305 + 351 + 338-310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Titanium (IV) bromide is an inorganic chemical compound of titanium from the group of bromides .

Extraction and presentation

Titanium (IV) bromide can be obtained by reacting titanium (IV) chloride with hydrogen bromide .

{\ displaystyle \ mathrm {TiCl_ {4} +4 \ HBr \ longrightarrow TiBr_ {4} +4 \ HCl}}

Other ways of obtaining are the reactions:

{\ displaystyle \ mathrm {Ti + 2 \ Br_ {2} \ longrightarrow TiBr_ {4}}}

{\ displaystyle \ mathrm {TiO_ {2} +2 \ C + 2 \ Br_ {2} \ longrightarrow TiBr_ {4} +2 \ CO}}

{\ displaystyle \ mathrm {3 \ TiCl_ {4} +4 \ BBr_ {3} \ longrightarrow 3 \ TiBr_ {4} +4 \ BCl_ {3}}}

Very pure titanium (IV) bromide can be produced through the reaction of lead (II) bromide with titanium.

{\ displaystyle \ mathrm {2 \ PbBr_ {2} + Ti \ longrightarrow 2 \ Pb + TiBr_ {4}}}

properties

Titanium (IV) bromide is in the form of amber-yellow, octahedral crystals. It is extremely hygroscopic, with hydrolytic decomposition into titanium (IV) oxide and hydrogen bromide. After crystallization from the melt, its crystal structure is isotypic with tin (IV) iodide with the space group Pa 3 (space group no. 205) (a = 1130.0 pm ). During storage, a conversion into the tin (IV) bromide type with the space group P 2 ₁ / c (No. 14) (a = 1017 pm, b = 709 pm, c = 1041 pm, β = 101.97 °) ). Template: room group / 205Template: room group / 14

use

Titanium (IV) bromide is used for the production of titanium disilicide thin films on silicon substrates.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1348ff.
↑ ^a ^b ^c ^d ^e ^f ^g data sheet Titanium (IV) bromide, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on August 8, 2012 ( PDF ).
^ Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . Springer DE, 1997, ISBN 3-540-60035-3 , pp. 766 ( limited preview in Google Book search).

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1348ff.

[Sigma-2] ↑ ^a ^b ^c ^d ^e ^f ^g data sheet Titanium (IV) bromide, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on August 8, 2012 ( PDF ).

[Jean_D'Ans,_Ellen_Lax-3] Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . Springer DE, 1997, ISBN 3-540-60035-3 , pp. 766 ( limited preview in Google Book search).