Tellurium dichloride

Tellurium dichloride
Identifiers


CAS Number	10025-71-5^Y
3D model (JSmol)	Interactive image
ChemSpider	2588376
PubChem CID	3341691
UNII	0T7J7SHH1H
CompTox Dashboard (EPA)	DTXSID60143068
InChI InChI=1S/Cl2Te/c1-3-2 Key: VXLPBEHPTWIBJR-UHFFFAOYSA-N
SMILES Cl[Te]Cl
Properties
Chemical formula	Cl₂Te
Molar mass	198.50 g·mol⁻¹
Appearance	black solid^[1]
Density	6.9 g·cm⁻³^[1]
Melting point	208 °C^[1]
Boiling point	328 °C^[1]
Solubility in water	reacts^[1]
Solubility	reacts with diethyl ether, insoluble in tetrachloromethane^[1]
Related compounds
Other anions	Ditellurium bromide, Te₂Br
Other cations	Dichlorine monoxide, OCl₂ Sulfur dichloride, SCl₂ Selenium dichloride, SeCl₂ Polonium dichloride, PoCl₂
Related compounds	Tritellurium dichloride, Te₃Cl₂ Tellurium tetrachloride, TeCl₄
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tellurium dichloride is a chloride of tellurium with the chemical formula TeCl₂.

Preparation

Tellurium dichloride can be produced by reacting tellurium with difluorodichloromethane.^[2]^[3]

It can also be produced by the comproportionation of tellurium and tellurium tetrachloride.^[4]

Properties

Tellurium dichloride is a black solid that reacts with water. It will melt into a black liquid and vapourize into a purple gas.^[1]^[5] The gas consists of monomeric TeCl₂ molecules with Te–Cl bond lengths of 2.329 Å and a Cl–Te–Cl bond angle of 97.0°.^[5]

Tellurium dichloride (TeCl₂) is unstable with respect to disproportionation.^[5] Several complexes of it are known and well characterized. They are prepared by treating tellurium dioxide with hydrochloric acid in the presence of thioureas. The thiourea serves both as a ligand and as a reductant, converting Te(IV) to Te(II).

References

^ ^a ^b ^c ^d ^e ^f ^g Perry, Dale (2011). Handbook of Inorganic Compounds. Boca Raton, FL: CRC Press. ISBN 978-1-4398-1462-8. OCLC 759865801.
^ Gmelin, Leopold (1976). Tellurium (in English and German). Springer-Verlag. OCLC 77834357.
^ Aynsley, E. E. (1953). "598. The preparation and properties of tellurium dichloride". Journal of the Chemical Society (Resumed). Royal Society of Chemistry (RSC): 3016. doi:10.1039/jr9530003016. ISSN 0368-1769.
^ Haaland, Arne (2008). Molecules and models : the molecular structures of main group element compounds. Oxford New York: Oxford University Press. ISBN 978-0-19-152860-6. OCLC 226969121.
^ ^a ^b ^c Fernholt, Liv; Haaland, Arne; Volden, Hans V.; Kniep, Rüdiger (1985). "The molecular structure of tellurium dichloride, TeCl₂, determined by gas electron diffraction". Journal of Molecular Structure. 128 (1–3). Elsevier BV: 29–31. Bibcode:1985JMoSt.128...29F. doi:10.1016/0022-2860(85)85037-7. ISSN 0022-2860.

v t e Tellurium compounds
Te₂Br TeBr₄ Te₃Cl₂ TeCl₂ TeCl₄ TeF₄ TeF₆ TeI TeI₄ TeO TeO₂ TeO₃ HOTeF₅ TeN TeO²⁻ ₄+TeO²⁻ ₃

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