Tungsten Iodide (II)

Tungsten iodide
Tungsten iodide
General
Systematic ; name	Tungsten Iodide (II)
Traditional names	tungsten iodide; tungsten hexamer diiodide
Chem. formula	Wi 2
Physical properties
condition	brown amorphous powder
Molar mass	437.66 g / mol
Density	6.9 g / cm³
Thermal properties
T. melt.	decomp. 400 ° C
Classification
Reg. CAS number
PubChem
Smiles
Inchi
ChemSpider

Tungsten (II) iodide is an inorganic compound, a salt of tungsten metal and hydroiodic acid with the formula WI ₂ , a brown amorphous powder that does not dissolve in cold water, reacts with hot.

Getting

Passing iodine vapor over tungsten powder:

{\mathsf {W+I_{2}\ {\xrightarrow {950^{o}C}}\ WI_{2}}}

{\ displaystyle {\ mathsf {W + I_ {2} \ {\ xrightarrow {950 ^ {o} C}} \ WI_ {2}}}}

Decomposition of tungsten (IV) iodide upon heating:

{\mathsf {WI_{4}\ {\xrightarrow {T}}\ WI_{2}+I_{2}}}

{\ displaystyle {\ mathsf {WI_ {4} \ {\ xrightarrow {T}} \ WI_ {2} + I_ {2}}}}

The reaction of tungsten (VI) chloride and hydrogen iodide:

{\mathsf {WCl_{6}+6HI\ {\xrightarrow {400-450^{o}C}}\ WI_{2}+6HCl+2I_{2}}}

{\ displaystyle {\ mathsf {WCl_ {6} + 6HI \ {\ xrightarrow {400-450 ^ {o} C}} \ WI_ {2} + 6HCl + 2I_ {2}}}}

Physical Properties

Tungsten (II) iodide forms a brown amorphous powder, does not dissolve in cold water, ethanol , carbon disulfide , and reacts with hot water.

The molecules of tungsten iodide are hexameric and have the structure [W ₆ I ₈ ] I ₄ .

Chemical Properties

Reacts with hot water:

{\mathsf {WI_{2}+2H_{2}O\ {\xrightarrow {80^{o}C}}\ WO_{2}\downarrow +2HI+H_{2}\uparrow }}

{\ displaystyle {\ mathsf {WI_ {2} + 2H_ {2} O \ {\ xrightarrow {80 ^ {o} C}} \ WO_ {2} \ downarrow + 2HI + H_ {2} \ uparrow}}}

Oxidized by heating in air:

{\mathsf {WI_{2}+O_{2}\ {\xrightarrow {}}\ WO_{2}+I_{2}}}

{\ displaystyle {\ mathsf {WI_ {2} + O_ {2} \ {\ xrightarrow {}} \ WO_ {2} + I_ {2}}}}

Hydrogen reduced to metallic tungsten:

{\mathsf {WI_{2}+H_{2}\ {\xrightarrow {500^{o}C}}\ W+2HI}}

{\ displaystyle {\ mathsf {WI_ {2} + H_ {2} \ {\ xrightarrow {500 ^ {o} C}} \ W + 2HI}}}

Reacts with chlorine and bromine when heated:

{\mathsf {WI_{2}+Cl_{2}\ {\xrightarrow {250^{o}C}}\ WCl_{2}+I_{2}}}

{\ displaystyle {\ mathsf {WI_ {2} + Cl_ {2} \ {\ xrightarrow {250 ^ {o} C}} \ WCl_ {2} + I_ {2}}}}

{\mathsf {WI_{2}+Br_{2}\ {\xrightarrow {350^{o}C}}\ WBr_{2}+I_{2}}}

{\ displaystyle {\ mathsf {WI_ {2} + Br_ {2} \ {\ xrightarrow {350 ^ {o} C}} \ WBr_ {2} + I_ {2}}}}

Literature

Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1988. - T. 1. - 623 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1972. - T. 2. - 871 p.

Tungsten Iodide (II)

Getting

Physical Properties

Chemical Properties

See also

Literature

More articles:

Tungsten iodide
General
Systematic name	Tungsten Iodide (II)
Traditional names	tungsten iodide; tungsten hexamer diiodide
Chem. formula	Wi ₂
Physical properties
condition	brown amorphous powder
Molar mass	437.66 g / mol
Density	6.9 g / cm³
Thermal properties
T. melt.	decomp. 400 ° C
Classification
Reg. CAS number
PubChem
Smiles
Inchi
ChemSpider