Tellurium tetrachloride
Crystal structure | ||||||||||||||||
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__ Te 4+ __ Cl - | ||||||||||||||||
General | ||||||||||||||||
Surname | Tellurium tetrachloride | |||||||||||||||
other names |
Tellurium (IV) chloride |
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Ratio formula | TeCl 4 | |||||||||||||||
Brief description |
yellow solid with a pungent odor |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 269.41 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
3.01 g cm −3 |
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Melting point |
224 ° C |
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boiling point |
380 ° C |
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solubility |
The substance decomposes in water under formation of TeO 2 and hydrogen chloride |
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safety instructions | ||||||||||||||||
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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 .
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 °.
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