Chemical compound
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.[ 1] [ 3]
2
W
(
C
O
)
6
+
3
I
2
⟶
2
W
I
3
+
12
C
O
{\displaystyle \mathrm {2\ W(CO)_{6}+3\ I_{2}\longrightarrow 2\ WI_{3}+12\ CO} }
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 .[ 1]
It decomposes to form tungsten(II) iodide :[ 1]
6
W
I
3
⟶
[
W
6
I
8
]
I
4
+
3
I
2
{\displaystyle \mathrm {6WI_{3}\longrightarrow [W_{6}I_{8}]I_{4}+3I_{2}} }
References
^ a b c d Brauer, Georg; Baudler, Marianne (1981). Handbuch der Präparativen Anorganischen Chemie, Band I. (3rd ed.). Stuttgart: Ferdinand Enke. ISBN 3-432-02328-6 ^ Lide, David R. (2004-06-29). CRC Handbook of Chemistry and Physics, 85th Edition . CRC Press. ^ Ströbele, Markus; Meyer, Hans-Jürgen (2019). "Pandora's box of binary tungsten iodides". Dalton Transactions . 48 (5): 1547–1561. doi :10.1039/C8DT04004D . PMID 30574976 . S2CID 58651255 .
Tungsten(0) Tungsten(II) Tungsten(III) Tungsten(IV) Tungsten(V) Tungsten(VI)
Salts and covalent derivatives of the
iodide ion
![{\displaystyle \mathrm {6WI_{3}\longrightarrow [W_{6}I_{8}]I_{4}+3I_{2}} }](https://wikimedia.org/api/rest_v1/media/math/render/svg/513818b045ab1b8d035327aa9d67afdf15c1d81b)