Tellurium tetrachloride

Crystal structure
	__ Te 4+ __ Cl -
General
Surname	Tellurium tetrachloride
other names	Tellurium (IV) chloride
Ratio formula	TeCl 4
Brief description	yellow solid with a pungent odor
External identifiers / databases
EC number	233-055-6
ECHA InfoCard	100.030.038
PubChem	61443
Wikidata	Q2256493
properties
Molar mass	269.41 g mol −1
Physical state	firmly
density	3.01 g cm −3
Melting point	224 ° C
boiling point	380 ° C
solubility	The substance decomposes in water under formation of TeO 2 and hydrogen chloride
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 314-318
	P: 260-303 + 361 + 353-305 + 351 + 338-301 + 330 + 331-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tellurium tetrachloride is an inorganic chemical compound of tellurium from the group of chlorides .

Extraction and presentation

Tellurium tetrachloride can be obtained by reacting tellurium with chlorine .

{\ displaystyle \ mathrm {Te + 2 \ Cl_ {2} \ longrightarrow TeCl_ {4}}}

properties

Tellurium tetrachloride is a moisture-sensitive white to yellow solid with a pungent odor that decomposes in water to form tellurium dioxide and hydrogen chloride . It dissolves in moist air with partial hydrolytic decomposition and is soluble in ethanol and toluene . Its melt is colored yellow, the vapor orange-red. From around 500 ° C, the compound decomposes with the release of chlorine, with the decomposition being complete at 1000 ° C. In the gaseous state, the structure is monomeric and corresponds to that of sulfur tetrafluoride . In the solid state it has a structure of Kuban type extending as from about four halide bridges linked TeCl ₃⁺ Cl ^- can be described units assembled. The crystal structure has monoclinic symmetry, space group C 2 / c (space group no. 15) , with the lattice parameters a = 17.076 Å , b = 10.404 Å, c = 15.252 Å and β = 116.82 °. Template: room group / 15

use

Tellurium tetrachloride can be used for syntheses in organic chemistry.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ data sheet Tellurium (IV) chloride, 99.9% (metals basis) from AlfaAesar, accessed on December 9, 2013 ( PDF )(JavaScript required) .
↑ ^a ^b Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 432.
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 632.
^ B. Buss, B. Krebs: The Crystal Structure of Tellurium Tetrachloride. In: Inorganic Chemistry . 10, 1971, pp. 2795-2800, doi: 10.1021 / ic50106a035 .
↑ N. Petragnani, JV Comasseto: Tellurium Reagents in Organic Synthesis; Recent Advances. Part 1. In: Synthesis. (10), 1991, pp. 793-817. doi: 10.1055 / s-1991-26577 . and ... Part 2. In: Synthesis. (11), 1991, pp. 897-919. doi: 10.1055 / s-1991-26605

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ data sheet Tellurium (IV) chloride, 99.9% (metals basis) from AlfaAesar, accessed on December 9, 2013 ( PDF )(JavaScript required) .

[brauer-2] Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 432.

[Arnold_F._Holleman,_Egon_Wiberg,_Nils_Wiberg-3] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 632.

[4] B. Buss, B. Krebs: The Crystal Structure of Tellurium Tetrachloride. In: Inorganic Chemistry . 10, 1971, pp. 2795-2800, doi: 10.1021 / ic50106a035 .

[5] N. Petragnani, JV Comasseto: Tellurium Reagents in Organic Synthesis; Recent Advances. Part 1. In: Synthesis. (10), 1991, pp. 793-817. doi: 10.1055 / s-1991-26577 . and ... Part 2. In: Synthesis. (11), 1991, pp. 897-919. doi: 10.1055 / s-1991-26605