Tellurium monoiodide
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3D model (JSmol)
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| ChemSpider | |
PubChem CID
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| Properties | |
| TeI | |
| Appearance | gray solid |
| Hazards | |
| GHS labelling:[1] | |
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| Warning | |
| H302, H312, H332 | |
| P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P312, P322, P330, P363, P501 | |
| Related compounds | |
Other anions
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ditellurium bromide |
Other cations
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selenium monochloride |
Related compounds
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tellurium tetraiodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tellurium iodide is an inorganic compound with the formula TeI. Two forms are known. Their structures differ from the other monohalides of tellurium. There are three subiodides of tellurium, α-TeI, β-TeI, and Te2I, and one tellurium tetraiodide.[2]
Preparation and properties
[edit]TeI is a gray solid formed by the hydrothermal reaction of tellurium metal and iodine in hydroiodic acid. When this reaction is conducted near 270 °C gives the α-TeI, which is triclinic. When the same mixture is heated to 150 °C, one obtains the metastable monoclinic phase β-TeI.[3] The compounds are related structurally to Te2I (see ditellurium bromide), but the additional iodide groups do not bridge to other Te centers.
The corresponding monochloride and monobromide are molecular compounds with the formula Te2X2.[2]
Tellurium diiodide
[edit]Although TeI2 has not been isolated in bulk, complexes of the type TeI2(thiourea)2 are well characterized. These complexes precipitate upon treatment of aqueous solutions of the related tellurium dibromide complex with sodium iodide.[4]
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References
[edit]- ^ GHS: PubChem
- ^ a b Zhengtao Xu "Recent Developments in Binary Halogen–Chalcogen Compounds, Polyanions and Polycations" in Handbook of Chalcogen Chemistry: New Perspectives in Sulfur, Selenium and Tellurium, Francesco Devillanova, Editor, 2006, RSC. pp. 381-416. Royal Society doi:10.1039/9781847557575-00455
- ^ R. Kniep, D. Mootz, A. Rabenau "Zur Kenntnis der Subhalogenide des Tellurs" Zeitschrift für anorganische und allgemeine Chemie 1976, Volume 422, pages 17–38. doi:10.1002/zaac.19764220103
- ^ Foss, Olav; Hauge, Sverre (1961). "Complexes of Divalent Tellurium with Thiourea". Acta Chemica Scandinavica. 15: 1615–1616. doi:10.3891/acta.chem.scand.15-1615.
- ^ Foss, Olav; Maartmann-Moe, Knut (1987). "Complexes of Tellurium Dichloride, Dibromide and Diiodide with Thiourea and Tetramethylselenourea, TeL2X2. X-Ray Crystal Structures". Acta Chemica Scandinavica. 41a: 121–129. doi:10.3891/acta.chem.scand.41a-0121.