Vanadium (III) iodide

Vanadium (III) iodide
IUPAC name Vanadium (III) iodide
Another name Vanadium triiodide
Characteristic
Chemical formula	VI3
The appearance	Black solid
Density	5.14 g/cm3, solid
Solubility to water	Soluble
Structure
Coordination structure	Eight figures
Associated material
Other anions	Vanadium (III) bromide
Other positive ions	Vanadium (II) iodide Titanium (III) iodide
I can put a case, the data without the special mention for normal temperature (25 degrees Celsius), the ordinary pressure (100 kPa).

Vanadium (III) (Yaw or vanadium, Vanadium(III) iodide) iodide is iodide of vanadium that a chemical formula is referred to VI₃. I am provided by heating vanadium powder and iodine to around 500 degrees Celsius with a paramagnetic solid [¹]. Absorbency is high, and a green ion peculiar to V(III) compound occurs when I dissolve in water.

The reaction that vanadium (III) iodide occurs because of metal vanadium and iodine can get high metal vanadium of the purity by the chemical transportation method for reversible reaction.

${\displaystyle {\ce {{2V}+3I2\ \rightleftarrows \ 2VI3}}}$

The crystal structure of VI₃ is hexagonal close-packed structure structure same as bismuth (III) iodide, and each vanadium center accounts for a one-third of the octahedron.

Dismutation assumes that I pyrolize VI₃, and vanadium (II) VI₂ iodide and vanadium (IV) VI₄ iodide occur. It is said that this VI₄ is a chief ingredient of the volatile gas generated by the steam transportation method.

${\displaystyle {\ce {2VI3->VI2+VI4}}}$ ${\displaystyle \Delta H=36.6\ {\rm {{kcal/mol}\ \Delta S=38.7eu}}}$

Footnote

1. ^ Juza, D.; Giegling, D. and Schäfer, H. (1969). "Über die Vanadiniodide VJ2 und VJ₃." Z. anorg. allg. Chem. 366: 121–9. doi: 10.1002/zaac.19693660303. 

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