Tellurium iodide

Tellurium iodide
Identifiers
CAS number 12600-42-9
Properties
Molecular formula TeI
Appearance gray solid
Hazards
EU classification not listed
Related compounds
Other anions ditellurium bromide
Other cations selenium monochloride
Related compounds tellurium tetraiodide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 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.[1]

Preparation and properties

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.[2] 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.[1]

References

  1. ^ 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
  2. ^ 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