Tellurium Dichloride

Tellurium dichloride
Identifiers
CAS Number	10025-71-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	2588376;
PubChem CID	3341691;
UNII	0T7J7SHH1H;
	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
Density	6.9 g·cm−3
Melting point	208 °C
Boiling point	328 °C
Solubility in water	reacts
Solubility	reacts with diethyl ether, insoluble in tetrachloromethane
Related compounds
Other anions	Ditellurium bromide, Te; 2Br
Other cations	Dichlorine monoxide, OCl; 2; Sulfur dichloride, SCl; 2; Selenium dichloride, SeCl; 2; Polonium dichloride, PoCl; 2
Related compounds	Tritellurium dichloride, Te; 3Cl; 2; Tellurium tetrachloride, TeCl; 4
	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. It is a lightly characterized material that has attracted little attention.

Preparation

Tellurium dichloride is claimed as the product of the reaction of 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 melts into a black liquid and vapourizes 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).

Although tellurium dichloride is lightly studied, molecular adducts of the title compound are well characterized.

Structure of *trans*-[TeCl₂(SC(NMe₂)₂)₂] (H atoms omitted).^[6] Color code: green = Cl, dark gray = Te, yellow = S.

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 Perry, Dale (2011). Handbook of Inorganic Compounds. Boca Raton, FL: CRC Press. ISBN 978-1-4398-1462-8. OCLC 759865801.
↑ Gmelin, Leopold (1976) (in en, de). Tellurium. 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.
↑ ^5.0 ^5.1 ^5.2 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 (Elsevier BV) 128 (1–3): 29–31. doi:10.1016/0022-2860(85)85037-7. ISSN 0022-2860. Bibcode: 1985JMoSt.128...29F.
↑ Foss, O.; Maartmann-Moe, K. (1986). "Crystal and Molecular Structures of trans Square–Planar Complexes of Tellurium Dichloride, Dibromide and Diiodide with Tetramethylthiourea, TeL₂X₂. Bond Lengths in Centrosymmetric Tellurium(II) Complexes". Acta Chemica Scandinavica A 40: 675. doi:10.3891/acta.chem.scand.40a-0675.

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Original source: https://en.wikipedia.org/wiki/Tellurium dichloride. Read more

[Dale_L._Perry-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 Perry, Dale (2011). Handbook of Inorganic Compounds. Boca Raton, FL: CRC Press. ISBN 978-1-4398-1462-8. OCLC 759865801.

[Leopold_Gmelin-2] Gmelin, Leopold (1976) (in en, de). Tellurium. Springer-Verlag. OCLC 77834357.

[DOI10.1039/JR9530003016-3] 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.

[Arne_Haaland-4] 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.

[Fernholt-5] 5.0 ^5.1 ^5.2 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 (Elsevier BV) 128 (1–3): 29–31. doi:10.1016/0022-2860(85)85037-7. ISSN 0022-2860. Bibcode: 1985JMoSt.128...29F.

[6] Foss, O.; Maartmann-Moe, K. (1986). "Crystal and Molecular Structures of trans Square–Planar Complexes of Tellurium Dichloride, Dibromide and Diiodide with Tetramethylthiourea, TeL₂X₂. Bond Lengths in Centrosymmetric Tellurium(II) Complexes". Acta Chemica Scandinavica A 40: 675. doi:10.3891/acta.chem.scand.40a-0675.

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Identifiers


CAS Number	10025-71-5^Y
3D model (JSmol)	Interactive image
ChemSpider	2588376
PubChem CID	3341691
UNII	0T7J7SHH1H
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, Te 2Br
Other cations	Dichlorine monoxide, OCl 2 Sulfur dichloride, SCl 2 Selenium dichloride, SeCl 2 Polonium dichloride, PoCl 2
Related compounds	Tritellurium dichloride, Te 3Cl 2 Tellurium tetrachloride, TeCl 4
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references