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Chemical formula | Cl2Te |
Molar mass | 198.50 g·mol |
Appearance | black solid |
Density | 6.9 g·cm |
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, 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 , 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.
It can also be produced by the comproportionation of tellurium and tellurium tetrachloride.
Properties
Tellurium dichloride is a black solid that reacts with water. It melts into a black liquid and vapourizes into a purple gas. 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°.
Tellurium dichloride (TeCl2) is unstable with respect to disproportionation. 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
- ^ 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.
- ^ 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.
Tellurium compounds | |
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