Telluride (chemistry)
| Telluride | |
|---|---|
| Identifiers | |
| ChemSpider | 19241429  |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | Te2− |
| Molar mass | 127.6 g mol-1 |
| Exact mass | 129.906222753 g mol-1 |
| Related compounds | |
| Other anions | Sulfide |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
| Infobox references | |
The telluride ion is the term for the anion Te2− and its derivatives. Telluride is member of the series of dianions O2−, S2−, and Se2− (see chalcogenide).[1]
Contents |
[edit] H2Te, HTe-, and Te2-
Hydrogen telluride, H2Te, is acidic hydride of tellurium. In aqueous solution it dissociates into the hydrogen telluride ion, HTe−. In aqueous solution, Te2− exists only at high pH. For this reason, solutions of sodium telluride (Na2Te) are rather basic.
[edit] Organotellurium compounds
Tellurides also describe a class of organotellurium compounds formally derived from Te2−. An illustrative member is dimethyl telluride. Such compounds are often called telluroethers because they are structurally related although the length of the C-Te bond is much longer than a C-O bond. C-Te-C angles tend to be closer to 90°.
[edit] Inorganic tellurides
Many metal tellurides are known, including some minerals. Although the bonding in these materials is often fairly covalent, they are described casually as salts of Te2−. Using this approach, Ag2Te is derived from Ag+. Tellurides of economic importance are those of cadmium, bismuth, and lead. Cadmium telluride has photovoltaic activity, while bismuth and lead tellurides are exceptional thermoelectric materials.[2]
[edit] References
- ^ Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.
- ^ "The Thespian Catalyst", David Saltzberg
See category for a list.
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