Molybdenum(III) Iodide
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Molybdenum III Iodide
Molybdenum(III) iodide
IUPAC names
Molybdenum(III) iodide
Molybdenum triiodide
3D model (JSmol)
  • InChI=1S/3HI.Mo/h3*1H;/q;;;+3/p-3
  • InChI=1/3HI.Mo/h3*1H;/q;;;+3/p-3
  • [Mo](I)(I)I
Molar mass 476.65 g/mol
Appearance black solid
Melting point 927 °C (1,701 °F; 1,200 K) (decomposes)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Molybdenum(III) iodide is the inorganic compound with the formula MoI3.


Molybdenum(III) iodide is created by the reaction of molybdenum hexacarbonyl with iodine gas at 105 °C (221 °F).[1]

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 300 °C (572 °F).


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.[1] Its crystal structure is isotypic with zirconium(II) iodide.[2]


  1. ^ a b hrsg. von Georg Brauer. Unter Mitarb. von M. Baudler (1981). Handbuch der präparativen anorganischen Chemie / 3 (3rd ed.). Stuttgart: Enke. p. 1539. ISBN 3-432-87823-0. OCLC 310719495.
  2. ^ Riedel, Erwin; Christoph, Janiak; Meyer, Hans-Jürgen (2012). Riedel moderne anorganische Chemie. Riedel, Erwin, 1930-, Janiak, Christoph., Meyer, Hans-Jürgen. (4. Aufl ed.). Berlin: De Gruyter. p. 357. ISBN 978-3-11-024900-2. OCLC 781540844.

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