Tungsten hexachloride

Short description: Tungsten-chloride compound

Tungsten hexachloride

α-Tungsten hexachloride

β-Tungsten hexachloride

| Tungsten hexachloride | 3D view

|

Names
IUPAC names

Tungsten hexachloride
Tungsten(VI) chloride

Identifiers

CAS Number

* 13283-01-7 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 75162

EC Number |

* 236-293-9

PubChem CID

* 83301

RTECS number |

* YO7710000

UNII |

* L32HZV95ZE Y

InChI

* InChI=1S/6ClH.W/h6*1H;/q;;;;;;+6/p-6

Key: KPGXUAIFQMJJFB-UHFFFAOYSA-H

SMILES

* Cl[W](Cl)(Cl)(Cl)(Cl)Cl

Properties

Chemical formula

| WCl

Molar mass | 396.54 g·mol−1
Appearance  | dark blue crystals, moisture sensitive
Density | 3.52 g/cm3
Melting point |  275 °C (527 °F; 548 K)
Boiling point |  346.7 °C (656.1 °F; 619.8 K)

Solubility in water

| Hydrolyzes
Solubility in chlorocarbons  | soluble

Magnetic susceptibility (χ)

| −71.0·10−6 cm3/mol
Structure

Crystal structure

| α:rhombohedral, β: hexagonal

Coordination geometry

| Octahedral

Dipole moment

| 0 D
Hazards
Main hazards | oxidizer; hydrolysis releases HCl
Related compounds

Other anions

* Tungsten hexafluoride
* Tungsten hexabromide

Other cations

* Molybdenum(VI) chloride
* Uranium hexachloride

Related compounds

* Tungsten(VI) oxytetrachloride
* Tungsten dichloride dioxide
* Tungsten(V) chloride
* Tungsten(IV) chloride
* Tungsten(III) chloride
* Tungsten(II) chloride
* Molybdenum(V) chloride
* Chromyl chloride

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Y verify (what is YN ?)
Infobox references

Tracking categories (test):

* PairSizeSet

Tungsten hexachloride is an inorganic chemical compound of tungsten and chlorine with the chemical formula WCl
6. This dark violet-blue compound exists as volatile crystals under standard conditions. It is an important starting reagent in the preparation of tungsten compounds.[1] Other examples of charge-neutral hexachlorides are rhenium(VI) chloride and molybdenum(VI) chloride. The highly volatile tungsten hexafluoride is also known.

As a d0 atom, tungsten hexachloride is diamagnetic.

## Contents

* 1 Preparation and structure
* 2 Reactions
* 3 Safety considerations
* 4 References

## Preparation and structure

Tungsten hexachloride can be prepared by chlorinating tungsten metal in a sealed tube at 600 °C:[2]

W + 3 Cl
2 → WCl

Tungsten hexachloride exists in both blue and red polymorphs, referred to respectively as α and β. The wine-red β can be obtained by rapid cooling, whereas the blue α form is more stable at room temperature. Although these polymorphs are distinctly colored, their molecular structures are very similar. Both polymorphs feature WCl
6 molecules that have octahedral geometry, in which all six W–Cl bonds are equivalent, and their length is equal to 224–226 pm. The densities are very similar: 3.68 g/cm3 for α and 3.62 g/cm3 for β. The low-temperature form is slightly more dense, as expected.[3]

## Reactions

Tungsten hexachloride is readily hydrolyzed, even by moist air, giving the orange oxychlorides WOCl
4 and WO
2Cl
2, and subsequently, tungsten trioxide. WCl
6 is soluble in carbon disulfide, carbon tetrachloride, and phosphorus oxychloride.[2]

Methylation with trimethylaluminium affords hexamethyl tungsten:

WCl
6 \+ 3 Al
2(CH

6 → W(CH

6 \+ 3 Al
2(CH

4Cl

Treatment with butyl lithium affords a reagent that is useful for deoxygenation of epoxides.[4]

The chloride ligands in WCl
6 can be replaced by many anionic ligands including: bromide, thiocyanate, alkoxide, alkyl and aryl.

Reduction of WCl
6 can be effected with a mixture of tetrachloroethylene and tetraphenylarsonium chloride:[5]

2 WCl
6 \+ Cl
2C=CCl
2 \+ 2 (C

4AsCl → 2 (C

4As[WCl
6] + Cl
3C–CCl

The W(V) hexachloride is a derivative of tungsten(V) chloride.

It reacts with arsenic or hydrogen arsenide to form tungsten diarsenide.[6][7]

## Safety considerations

WCl
6 is an aggressively corrosive oxidant, and hydrolyzes to release hydrogen chloride.

## References

1. ↑ J. W. Herndon; M. E. Jung (2007). "Encyclopedia of Reagents for Organic Synthesis". Encyclopedia of Reagents for Organic Synthesis. Wiley. doi:10.1002/9780470842898.rt430.pub2. ISBN 978-0-471-93623-7. .
2. ↑ 2.0 2.1 M. H. Lietzke; M. L. Holt (1950). "Tungsten(VI) Chloride (Tungsten Hexachloride)". Inorganic Syntheses. 3. p. 163. doi:10.1002/9780470132340.ch44. ISBN 978-0-470-13162-6.
3. ↑ J. C. Taylor; P. W. Wilson (1974). "The Structure of β-Tungsten Hexachloride by Powder Neutron and X-ray Diffraction". Acta Crystallographica B30 (5): 1216–1220. doi:10.1107/S0567740874004572. Bibcode: 1974AcCrB..30.1216T. .
4. ↑ M. A. Umbreit, K. B. Sharpless (1990). "Deoxygenation of Epoxides with Lower Valent Tungsten Halides: trans-Cyclododecene". Organic Syntheses. http://www.orgsyn.org/demo.aspx?prep=CV7P0121. ;  Collective Volume, 7, pp. 121
5. ↑ Uhl, G.; Hey, E.; Becker, G.; Weller, F.; Dehnicke, K. (1983). "Über die Reaktion von 2,2-Dimethylpropylidinphosphan mit Wolframhexachlorid; die Kristallstrukturen von [(Cl3PO)WCL4(H9C4CCC4H9)] und [(H5C6)4As][WCL6]". Zeitschrift für Anorganische und Allgemeine Chemie 497 (2): 213–223. doi:10.1002/zaac.19834970221. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-57717.
6. ↑ Lassner, Erik; Schubert, Wolf-Dieter (2012-12-06). Tungsten. Springer Science & Business Media. p. 145. ISBN 978-1-4615-4907-9.
7. ↑ Meyer, R. J. (2013-09-03) (in de). Wolfram. Springer-Verlag. p. 207. ISBN 978-3-662-13401-6.

* v
* t
* e

Tungsten compounds

Tungsten(0)|

* W(CO)6

Tungsten(II)|

* WSi2
* WCl2
* W(OH)2

Tungsten(III)|

* W2O3

Tungsten(IV)|

* WC
* WO2
* WS2
* WSe2
* WTe2
* WF4
* WCl4

Tungsten(V)|

* W2O5
* WBr5
* W2Cl10

Tungsten(VI)|

* H3PW12O40
* (NH4)10(H2W12O42)
* WO2Cl2
* WCl6
* WF6
* WN2
* WO3
* WS3
* WOBr4
* WOCl4
* WOF4
* H2WO4

| Organotungsten(VI) compounds|

* W(CH3)6

|

* v
* t
* e

Salts and covalent derivatives of the chloride ion

HCl |  |  |  | He

|
|
|
|

LiCl | BeCl2 | BCl3
B2Cl4 | CCl4 | NCl3
ClN3 | Cl2O
ClO2
Cl2O7 | ClF
ClF3
ClF5 | Ne
NaCl | MgCl2 | AlCl
AlCl3 | SiCl4 | P2Cl4
PCl3
PCl5 | S2Cl2
SCl2
SCl4 | Cl2 | Ar
KCl | CaCl
CaCl2 | ScCl3 | TiCl2
TiCl3
TiCl4 | VCl2
VCl3
VCl4
VCl5 | CrCl2
CrCl3
CrCl4 | MnCl2 | FeCl2
FeCl3 | CoCl2
CoCl3 | NiCl2 | CuCl
CuCl2 | ZnCl2 | GaCl2
GaCl3 | GeCl2
GeCl4 | AsCl3
AsCl5 | Se2Cl2
SeCl4 | BrCl | KrCl
RbCl | SrCl2 | YCl3 | ZrCl3
ZrCl4 | NbCl4
NbCl5 | MoCl2
MoCl3
MoCl4
MoCl5
MoCl6 | TcCl4 | RuCl3 | RhCl3 | PdCl2 | AgCl | CdCl2 | InCl
InCl2
InCl3 | SnCl2
SnCl4 | SbCl3
SbCl5 | Te3Cl2
TeCl4 | ICl
ICl3 | XeCl
XeCl2
CsCl | BaCl2 |  | HfCl4 | TaCl5 | WCl2
WCl3
WCl4
WCl5
WCl6 | Re3Cl9
ReCl4
ReCl5
ReCl6 | OsCl4 | IrCl2
IrCl3
IrCl4 | PtCl2
PtCl4 | AuCl
AuCl3 | Hg2Cl2,
HgCl2 | TlCl | PbCl2,
PbCl4 | BiCl3 | PoCl2,
PoCl4 | AtCl  | RnCl2
FrCl | RaCl2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
LaCl3 | CeCl3 | PrCl3 | NdCl2,
NdCl3 | PmCl3 | SmCl2,
SmCl3 | EuCl2,
EuCl3 | GdCl3 | TbCl3 | DyCl2,
DyCl3 | HoCl3 | ErCl3 | TmCl2
TmCl3 | YbCl2
YbCl3 | LuCl3
AcCl3 | ThCl4 | PaCl5 | UCl3
UCl4
UCl5
UCl6 | NpCl4 | PuCl3 | AmCl2
AmCl3 | CmCl3 | BkCl3 | CfCl3 | EsCl3 | Fm  | Md  | No  | LrCl3

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Tungsten hexachloride. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Tungsten_hexachloride&oldid=4029217"
*[CID]: Compound ID
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template