tungsten(III) iodide
{{chembox
| Name = Tungsten(III) iodide
| ImageFileL1 =
| ImageFileR1 =
| ImageName =
| OtherNames = Tungsten triiodide
|Section1={{Chembox Identifiers
| ChemSpiderID = 65321903
| CASNo = 15513-69-6
| CASNo_Ref = {{cascite|correct|CAS}}
| UNII =
| PubChem = 12010987
| InChI = InChI=1S/3HI.W/h3*1H;/q;;;+3/p-3
| InChIKey = BHPNVJNBEDSWEE-UHFFFAOYSA-K
| SMILES = I[W](I)I
| StdInChI =
| StdInChIKey_Ref =
| StdInChIKey =
}}
|Section2={{Chembox Properties
| Formula = WI3
| MolarMass = 564.6
| Appearance = Black solid{{Cite book|last1=Brauer|first1=Georg|title=Handbuch der Präparativen Anorganischen Chemie, Band I.|last2=Baudler|first2=Marianne|publisher=Ferdinand Enke|year=1981|isbn=3-432-02328-6|edition=3rd|location=Stuttgart|pages=}}
| Density =
| Solubility = Insoluble{{cite book |last=Lide|first=David R.|author-link= |date=2004-06-29|title=CRC Handbook of Chemistry and Physics, 85th Edition|url= |location= |publisher=CRC Press|page= |isbn=}}
| SolubleOther =
| Solvent =
| MeltingPtC =
| MeltingPt_notes =
| BoilingPtC =
| BoilingPt_notes =
}}
|Section3={{Chembox Structure
| Coordination =
| CrystalStruct =
| SpaceGroup =
}}
|Section7={{Chembox Hazards
| ExternalSDS =
}}
|Section8={{Chembox Related
| OtherAnions = Tungsten(III) bromide
Tungsten(III) chloride
| OtherCations = Chromium(III) iodide
Molybdenum(III) iodide
}}
}}
Tungsten(III) iodide or tungsten triiodide is a chemical compound of tungsten and iodine with the formula WI3.
Preparation
Tungsten(III) iodide can be prepared by reducing tungsten hexacarbonyl with iodine.{{cite journal |last1=Ströbele|first1=Markus|last2=Meyer|first2=Hans-Jürgen|title=Pandora's box of binary tungsten iodides |journal=Dalton Transactions|year=2019|volume=48|issue=5 |pages=1547–1561|doi=10.1039/C8DT04004D |pmid=30574976|s2cid=58651255 }}
:
Properties
Tungsten(III) iodide is a black solid that releases iodine at room temperature, and is less stable than molybdenum(III) iodide. It is soluble in acetone and nitrobenzene, and slightly soluble in chloroform.
It decomposes to form tungsten(II) iodide:
: