Tungsten hexachloride

|

Names
IUPAC names

Tungsten hexachloride
Tungsten(VI) chloride

Identifiers

CAS Number

* 13283-01-7 Y

3D model (JSmol)

* Interactive image

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

SMILES

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

Properties

Chemical formula

| WCl6
Molar mass | 396.61 g/mol
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(V) chloride
Chromyl chloride

Related compounds

| Tungsten(IV) chloride
Tungsten(V) 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 the chemical compound of tungsten and chlorine with the formula WCl6. This dark violet blue species exists as a volatile solid under standard conditions. It is an important starting reagent in the preparation of tungsten compounds.[1] Other examples of charge-neutral hexachlorides are ReCl6 and MoCl6. The highly volatile WF6 is also known.

As a d0 ion, W(VI) forms diamagnetic derivatives. The hexachloride is octahedral with equivalent W–Cl distances of 2.24–2.26 Å.[2]

## Contents

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

## Preparation

Tungsten hexachloride can be prepared by chlorinating tungsten metal in a sealed tube at 600 °C:[3]

W + 3 Cl2 → WCl6

## Properties and Reactions

Tungsten (VI) chloride is a blue-black solid at room temperature. At lower temperatures, it becomes wine-red in color. A red form of the compound can be made by rapidly condensing its vapor, which reverts to the blue-black form on gentle heating. It is readily hydrolyzed, even by moist air, giving the orange oxychlorides WOCl4 and WO2Cl2, and subsequently, tungsten trioxide. WCl6 is soluble in carbon disulfide, carbon tetrachloride, and phosphorus oxychloride.[3]

Methylation with trimethylaluminium affords hexamethyl tungsten:

WCl6 +3 Al2(CH3)6 → W(CH3)6 \+ 3 Al2(CH3)4Cl2

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

The chloride ligands in WCl6 can be replaced by many anionic ligands including: Br−, NCS−, and RO− (R = alkyl, aryl).

Reduction of WCl6 gives, sequentially, tungsten(V) chloride and tungsten(IV) chloride.

## Safety considerations

WCl6 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 978-0471936237. .
2. ↑ 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. .
3. ↑ 3.0 3.1 M. H. Lietzke; M. L. Holt (1950). Tungsten(VI) Chloride (Tungsten Hexachloride). Inorganic Syntheses. 3. p. 163. doi:10.1002/9780470132340.ch4.
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

* 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=232094"
*[CID]: Compound ID
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template