Molybdenum(III) iodide
{{chembox
| verifiedrevid = 428807101
| Name = Molybdenum(III) iodide
| ImageFile = Molybdenum(III)-iodide-xtal-packing-c-3D-bs-17.png
| ImageSize =
| ImageName = Molybdenum(III) iodide
| IUPACName = Molybdenum(III) iodide
Molybdenum triiodide
| OtherNames =
|Section1={{Chembox Identifiers
| CASNo = 14055-75-5
| CASNo_Ref = {{cascite|correct|CAS}}
| RTECS =
| PubChem = 5149862
| EINECS =
| ChemSpiderID = 4323230
| SMILES = [Mo](I)(I)I
| InChI = 1/3HI.Mo/h3*1H;/q;;;+3/p-3
| InChIKey = MMQODXFIGCNBIM-DFZHHIFOAA
| StdInChI = 1S/3HI.Mo/h3*1H;/q;;;+3/p-3
| StdInChIKey = MMQODXFIGCNBIM-UHFFFAOYSA-K
}}
|Section2={{Chembox Properties
| Formula = MoI3
| MolarMass = 476.65 g/mol
| Appearance = black solid{{Greenwood&Earnshaw2nd|pages=1019-1021}}
| Density =
| Solubility = insoluble
| SolubleOther =
| MeltingPtC = 927
| MeltingPt_notes = (decomposes)
| BoilingPtC =
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|Section3={{Chembox Structure
| Coordination =
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| Dipole =
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|Section7={{Chembox Hazards
| ExternalSDS =
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Molybdenum(III) iodide is the inorganic compound with the formula MoI3.
Preparation
Molybdenum(III) iodide is created by the reaction of molybdenum hexacarbonyl with iodine gas at {{convert|105|C|F}}.{{Cite book|last=hrsg. von Georg Brauer. Unter Mitarb. von M. Baudler|url=https://www.worldcat.org/oclc/310719495|title=Handbuch der präparativen anorganischen Chemie / 3.|date=1981|publisher=Enke|isbn=3-432-87823-0|edition=3rd|location=Stuttgart|pages=1539|oclc=310719495}}
:2 Mo(CO)6 + 3 I2 → 2 MoI3 + 12 CO
It can also be made from molybdenum(V) chloride and a solution of hydrogen iodide in carbon disulfide.
:MoCl5 + 5 HI → MoI3 + 5 HCl + I2
A further method is direct reaction between molybdenum metal and excess iodine at {{convert|300|C|F|abbr=}}.
:2 Mo + 3 I2 → 2 MoI3
As molybdenum(III) iodide is the highest stable iodide of molybdenum, this is the preferred route.
Properties
Molybdenum(III) iodide is a black antiferromagnetic solid that is air-stable at room temperature. In vacuum, it decomposes above 100 °C to molybdenum(II) iodide and iodine. It is insoluble in polar and non-polar solvents. Its crystal structure is isotypic with zirconium(III) iodide.{{Cite book|last1=Riedel|first1=Erwin|url=https://www.worldcat.org/oclc/781540844|title=Riedel moderne anorganische Chemie|last2=Christoph|first2=Janiak|last3=Meyer|first3=Hans-Jürgen|date=2012|publisher=De Gruyter|others=Riedel, Erwin, 1930-, Janiak, Christoph., Meyer, Hans-Jürgen.|isbn=978-3-11-024900-2|edition=4. Aufl|location=Berlin|pages=357|oclc=781540844}}
References
{{Reflist}}
- [http://www.webelements.com/compounds/molybdenum/molybdenum_triiodide.html Momlybdenum triiodide at Web Elements]
{{Molybdenum compounds}}
{{Iodides}}