Tungsten (II) Chloride

Tungsten chloride
Tungsten chloride
Are common
Systematic ; name	Tungsten (II) Chloride
Traditional names	Tungsten chloride; tungsten dichloride hexamer
Chem. formula	Wcl 2
Physical properties
condition	amorphous gray matter
Molar mass	254.76 g / mol
Density	5,436 g / cm³
Thermal properties
T. melt.	decomp. 627 ° C
Classification
Reg. CAS number

Tungsten (II) chloride is an inorganic compound, a salt of tungsten metal and hydrochloric acid with the formula WCl ₂ , a gray amorphous substance that reacts with water to form crystalline hydrate .

Content

Getting

Hydrogen reduction of tungsten (VI) chloride :

{\mathsf {2WCl_{6}+3H_{2}\ {\xrightarrow {T}}\ WCl_{2}+WCl_{4}+6HCl}}

{\ displaystyle {\ mathsf {2WCl_ {6} + 3H_ {2} \ {\ xrightarrow {T}} \ WCl_ {2} + WCl_ {4} + 6HCl}}}

Decomposition of tungsten (IV) chloride when heated in an inert atmosphere:

{\mathsf {3WCl_{4}\ {\xrightarrow {475^{o}C}}\ WCl_{2}+2WCl_{5}}}

{\ displaystyle {\ mathsf {3WCl_ {4} \ {\ xrightarrow {475 ^ {o} C}} \ WCl_ {2} + 2WCl_ {5}}}}

Physical Properties

Tungsten (II) chloride forms a gray amorphous substance, is unstable in air, hygroscopic , and reacts with water.

The tungsten chloride molecules are hexameric and have the structure [W ₆ Cl ₈ ] Cl ₄ .

Known crystalline hydrate composition [W ₆ Cl ₈ ] Cl ₄ • 2H ₂ O.

Chemical Properties

It decomposes on heating in an inert atmosphere:

{\mathsf {5WCl_{2}\ {\xrightarrow {627^{o}C}}\ 3W+2WCl_{5}}}

{\ displaystyle {\ mathsf {5WCl_ {2} \ {\ xrightarrow {627 ^ {o} C}} \ 3W + 2WCl_ {5}}}}

Reacts with water:

{\mathsf {WCl_{2}+2H_{2}O\ {\xrightarrow {}}\ WO_{2}\downarrow +2HCl+H_{2}\uparrow }}

{\ displaystyle {\ mathsf {WCl_ {2} + 2H_ {2} O \ {\ xrightarrow {}} \ WO_ {2} \ downarrow + 2HCl + H_ {2} \ uparrow}}}

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.