Tellurium monoiodide

Tellurium iodide  Identifiers

CAS Number

* 12600-42-9 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 103867644
* TeI2: 9146156

PubChem CID

* 92025674
* TeI2: 10970946

InChI

* InChI=1S/ITe/c1-2

Key: PNRYLQGKCSQOGH-UHFFFAOYSA-N

SMILES

* [Te]I

Properties

Chemical formula

| TeI
Appearance  | gray solid
Hazards
GHS pictograms |
GHS Signal word | warning

GHS hazard statements

| Template:HPhrases

GHS precautionary statements

| Template:PPhrases
Related compounds

Other anions

| ditellurium bromide

Other cations

| selenium monochloride

Related compounds

| tellurium tetraiodide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

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

TeI is a gray solid formed by the solvothermal reaction of tellurium metal and iodine in hydroiodic[3] or chloroaluminic acid.[4] 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

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.[5]

Structure of TeI2(thiourea)2.[6]

## References

1. ↑ GHS: PubChem
2. ↑ 2.0 2.1 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
3. ↑ 3.0 3.1 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
4. ↑ Groh, Matthias F.; Muller, Ulrike; Ahmed, Ejaz; Rothenberger, Alexander; Ruck, Michael (2013). "Substitution of conventional high-temperature syntheses of inorganic compounds by near-room-temperature syntheses in ionic liquids". Zeitschrift fur Naturforschung (Tubingen: Verlag der Zeitschrift fur Naturforschung) 68b: 1110. doi:10.5560/ZNB.2013-3141.
5. ↑ 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.
6. ↑ 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.

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Tellurium compounds

* Te2Br
* TeBr4
* Te3Cl2
* TeCl4
* TeF4
* TeF6
* TeI4
* TeO
* TeO2
* TeO3
* TeN

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