Tungsten(VI) Chloride Property

Melting point:

275 °C(lit.)

Boiling point:

347 °C(lit.)

Density 

3.52 g/mL at 25 °C(lit.)

vapor pressure 

43 mm Hg ( 215 °C)

Flash point:

346°C

solubility 

Soluble in carbon disulfide, carbon tetrachloride and phosphorus oxychloride.

form 

powder

color 

Gray to dark gray-blue

Water Solubility 

soluble organic solvents such as ethanol [HAW93]

Sensitive 

Moisture Sensitive

Exposure limits

ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; TWA 1 mg/m3; STEL 10 mg/m3; STEL 3 mg/m3

InChI

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

InChIKey

KPGXUAIFQMJJFB-UHFFFAOYSA-H

SMILES

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

CAS DataBase Reference

13283-01-7(CAS DataBase Reference)

EPA Substance Registry System

Tungsten chloride (WCl6), (OC-6-11)- (13283-01-7)

Safety

Hazard Codes 

C

Risk Statements 

34-29-22

Safety Statements 

26-36/37/39-45-8

RIDADR 

UN 3260 8/PG 2

WGK Germany 

3

RTECS 

YO7710000

F 

1-10-16

TSCA 

Yes

HazardClass 

8

PackingGroup 

II

HS Code 

28273990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

H335May cause respiratory irritation

H412Harmful to aquatic life with long lasting effects

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P271Use only outdoors or in a well-ventilated area.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Tungsten(VI) Chloride Chemical Properties,Usage,Production

Description

Tungsten(VI) chloride, WCl6, is a dark violet blue species that exists as a volatile solid under standard conditions. It is an important starting reagent in the preparation of tungsten compounds. As a d0 ion, W(VI) forms diamagnetic derivatives. WCl6 is octahedral with equivalent W-Cl distances of 2.24-2.26 ? .

Chemical Properties

dark grey-violet crystalline powder. Tungsten(VI) chloride is a blue-black solid at room temperature. At lower temperatures, it turns into wine red. A red form of the compound can be formed by quickly condensing its vapor, which transforms to the blue-black form on gentle heating. It is easily hydrolyzed, even by moist air, giving the orange oxychlorides WOCl4 and WO2Cl2, and then, tungsten trioxide. WCl6 is soluble in carbon disulfide, carbon tetrachloride, and phosphorus oxychloride. Methylation with trimethylaluminum forms hexamethyl tungsten.

Uses

Precursor to tungsten-based carbenes which catalyze the olefin metathesis reactions of 1- and 2-octene.

Uses

A precursor to tungsten based carbenes.

Uses

It is a precursor for many tungsten compounds. It is used in tungsten plating, purification of tungsten, and olefin polymerization. It is also used as petroleum catalyst, and in intelligent glass. It can be used for deoxygenation of epoxides and as a reagent in organic synthesis.

Definition

ChEBI: Tungsten hexachloride is a tungsten coordination entity.

Preparation

WCl6 can be prepared by chlorinating tungsten metal in a sealed tube at 600℃.
W +3Cl2→WCl6

Reactions

The tungsten reagents were prepared from tungsten hexachloride (Tungsten(VI) Chloride) in three ways: (i) with butyllithium; (ii) with a lithium dispersion; and (iii) with lithium iodide. In each case the ratio of WCl6 to lithium reagent is important.

Flammability and Explosibility

Not classified

Purification Methods

Sublime it in a stream of Cl2 in a high temperature furnace and collect it in a receiver cooled in a Dry Ice-acetone bath in an inert atmosphere because it is sensitive to moisture. It is soluble in CS2, CCl4, CHCl3, POCl3, *C6H6, pet ether and Me2CO. Its solutions decompose on standing. Good crystals can be obtained by heating WCl6 in CCl4 to 100o in a sealed tube, followed by slow cooling (tablets of four-sided prisms). Store it in a desiccator over H2SO4 in the dark. [Leitzke & Holt Inorg Synth III 163 1950, Parterfield & Tyree Inorg Synth IX 133 1967, Hein & Herzog in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1420 1965.]