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==Synthesis== |
==Synthesis== |
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TeCl<sub>4</sub> is prepared by [[chlorination]] of [[tellurium]] powder: |
TeCl<sub>4</sub> is prepared by [[halogenation|chlorination]] of [[tellurium]] powder: |
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:Te + 2 Cl<sub>2</sub> → TeCl<sub>4</sub> |
:Te + 2 Cl<sub>2</sub> → TeCl<sub>4</sub> |
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The reaction is initiated with heat. The product is isolated by distillation.<ref>{{cite journal | editor = | journal = [[Inorganic Syntheses]] | author = Suttle, J. F.; Smith, C. R. F. | year = 1950 | title = Tellurium(IV) chloride | volume = 3 | pages = 140–2 | isbn = 978-0-470-13162-6 | doi = 10.1002/9780470132340 | series = Inorganic Syntheses | editor1-last = Audrieth | editor1-first = Ludwig F.}}</ref> |
The reaction is initiated with heat. The product is isolated by distillation.<ref>{{cite journal | editor = | journal = [[Inorganic Syntheses]] | author = Suttle, J. F.; Smith, C. R. F. | year = 1950 | title = Tellurium(IV) chloride | volume = 3 | pages = 140–2 | isbn = 978-0-470-13162-6 | doi = 10.1002/9780470132340 | series = Inorganic Syntheses | editor1-last = Audrieth | editor1-first = Ludwig F.}}</ref> |
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| Names | |
|---|---|
| IUPAC names
Tellurium(IV) chloride | |
| Other names
Tellurium chloride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider |
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| ECHA InfoCard | 100.030.038 
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| [TeCl4]4 | |
| Molar mass | 1077.64 g/mol |
| Appearance | hygroscopic pale yellow solid (if fused, maroon liquid) |
| Density | 3.26 g/cm³, solid |
| Melting point | 224 °C |
| Boiling point | 380 °C |
| Structure | |
| Monoclinic, mS80 | |
| C12/c1, No. 15 | |
| Distorted octahedral (Te) | |
| Seesaw (gas phase) | |
| 2.59 D (gas phase) | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
Toxic, corrosive, respiratory irritant |
| Related compounds | |
Other anions |
Tellurium tetrafluoride Tellurium tetrabromide Tellurium tetraiodide |
Other cations |
Selenium tetrachloride Polonium tetrachloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Tellurium tetrachloride is the inorganic compound with the empirical formula TeCl4. The compound is volatile, subliming at 200 °C at 0.1 mm Hg.[1] Molten TeCl4 is ionic, dissociating into ions TeCl3+ and Te2Cl102−.[1]
TeCl4 is monomeric in the gas phase, with a structure similar to that of SF4.[2] In the solid state, it is a tetrameric cluster, Te4Cl16. The cluster with a Te4Cl4 core and three terminal chloride ligands for each Te. Alternatively it can be considered as a Te4 tetrahedron with face-capping chlorines and three terminal chlorines per tellurium atom, giving each tellurium atom a distorted octahedral environment
TeCl4 is prepared by chlorinationoftellurium powder:
The reaction is initiated with heat. The product is isolated by distillation.[3]
TeCl4 has proven of occasional interest in organic synthesis.[4] It adds to alkenes to give Cl-C-C-TeCl3 derivatives, wherein the Te can be subsequently removed with sodium sulfide. Electron-rich arenes react to give aryl Te compounds. Thus anisole give TeCl2(C6H4OMe)2, which can be reduced to the diaryl telluride.
As is the case for other tellurium compounds, TeCl4 is toxic. It also releases HCl upon hydrolysis.
{{cite journal}}: CS1 maint: multiple names: authors list (link)
