Titanium (IV) iodide

Structural formula
General
Surname	Titanium (IV) iodide
other names	Titanium tetraiodide
Molecular formula	TiI 4
Brief description	red-brown solid
External identifiers / databases
EC number	231-754-0
ECHA InfoCard	100,028,868
PubChem	111328
Wikidata	Q419743
properties
Molar mass	555.49 g mol −1
Physical state	firmly
density	4.3 g cm −3 (25 ° C)
Melting point	150 ° C
boiling point	377 ° C
solubility	dissolves in water with hydrolytic decomposition
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) iodide is an inorganic chemical compound of titanium from the group of iodides .

Extraction and presentation

Titanium (IV) iodide can be obtained by reacting titanium with iodine .

{\ displaystyle \ mathrm {Ti + 2 \ I_ {2} \ longrightarrow TiI_ {4}}}

Alternatively it can be made from titanium oxides with the help of aluminum (III) iodide

{\ displaystyle \ mathrm {3 \ TiO_ {2} +4 \ AlI_ {3} \ longrightarrow 3 \ TiI_ {4} +2 \ Al_ {2} O_ {3}}}

or obtained by reacting titanium (IV) chloride with hydrogen iodide .

{\ displaystyle \ mathrm {TiCl_ {4} +4 \ HI \ longrightarrow TiI_ {4} +4 \ HCl}}

properties

Titanium (IV) iodide is a red-brown solid that fumes heavily in the air. It crystallizes in an octahedral shape in the space group Pa 3 (space group no. 205) (a = 1202 pm ). If stored below 125 ° C for a longer period, it is converted into another, hexagonal modification (a = 797.8 pm, c = 1968 pm). Titanium (IV) iodide is a strong Lewis acid and forms very stable adducts with Lewis bases (e.g. with ethers and amines). Template: room group / 205

use

Titanium (IV) iodide is used in chemical vapor deposition of titanium nitride films with optimized parameters.

Titanium (IV) iodide is now formed during the production of very pure titanium in the Van Arkel de Boer process .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet Titanium (IV) iodide, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on August 6, 2012 ( PDF ).
↑ ^a ^b ^c ^d ^e 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. 1350.
↑ Erik GM Tornqvist, Willard F. Libby: Crystal structure, solubility, and electronic spectrum of titanium tetraiodide. In: Inorganic Chemistry. 18, 1979, pp. 1792-1796, doi : 10.1021 / ic50197a013 .
^ ^A ^b Hans P. Latscha, Helmut A. Klein: Inorganic Chemistry . Springer DE, 2002, ISBN 3-540-42938-7 , pp. 394 ( limited preview in Google Book search).

[Sigma-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet Titanium (IV) iodide, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on August 6, 2012 ( PDF ).

[brauer-2] 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. 1350.

[DOI10.1021/ic50197a013-3] Erik GM Tornqvist, Willard F. Libby: Crystal structure, solubility, and electronic spectrum of titanium tetraiodide. In: Inorganic Chemistry. 18, 1979, pp. 1792-1796, doi : 10.1021 / ic50197a013 .

[Hans_P._Latscha,_Helmut_A._Klein-4] A ^b Hans P. Latscha, Helmut A. Klein: Inorganic Chemistry . Springer DE, 2002, ISBN 3-540-42938-7 , pp. 394 ( limited preview in Google Book search).