Molybdenum(III) iodide

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Molybdenum(III) iodide
Molybdenum(III) iodide
Names
IUPAC names
Molybdenum(III) iodide
Molybdenum triiodide
Identifiers
3D model (
JSmol
)
ChemSpider
  • InChI=1S/3HI.Mo/h3*1H;/q;;;+3/p-3
    Key: MMQODXFIGCNBIM-UHFFFAOYSA-K
  • InChI=1/3HI.Mo/h3*1H;/q;;;+3/p-3
    Key: MMQODXFIGCNBIM-DFZHHIFOAA
  • [Mo](I)(I)I
Properties
MoI3
Molar mass 476.65 g/mol
Appearance black solid[1]
Melting point 927 °C (1,701 °F; 1,200 K) [1] (decomposes)
insoluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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 105 °C (221 °F).[2]

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).

2 Mo + 3 I2 → 2 MoI3

As molybdenum(III) iodide is the highest stable iodide of molybdenum, this is the preferred route.[1]

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.[2] Its crystal structure is isotypic with zirconium(III) iodide.[3]

References

  1. ^
    ISBN 978-0-08-037941-8
    .
  2. ^
    OCLC 310719495
    .
  3. OCLC 781540844
    .
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