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HomeProduct name listTungsten(VI) Chloride

Tungsten(VI) Chloride

Synonym(s):Tungsten hexachloride

  • CAS NO.:13283-01-7
  • Empirical Formula: Cl6W
  • Molecular Weight: 396.56
  • MDL number: MFCD00011463
  • EINECS: 236-293-9
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-12-18 14:15:30
Tungsten(VI) Chloride Structural

What is Tungsten(VI) Chloride?

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.

The Uses of Tungsten(VI) Chloride

A precursor to tungsten based carbenes.

The Uses of Tungsten(VI) Chloride

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

The Uses of Tungsten(VI) Chloride

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.

Preparation

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

What are the applications of Application

Tungsten(VI) chloride is a precursor to tungsten based carbenes

Definition

ChEBI: Tungsten hexachloride is a tungsten coordination entity.

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.]

Properties of Tungsten(VI) Chloride

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
CAS DataBase Reference 13283-01-7(CAS DataBase Reference)
EPA Substance Registry System Tungsten chloride (WCl6), (OC-6-11)- (13283-01-7)

Safety information for Tungsten(VI) Chloride

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H314:Skin corrosion/irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
H412:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P260:Do not breathe dust/fume/gas/mist/vapours/spray.
P271:Use only outdoors or in a well-ventilated area.
P273:Avoid release to the environment.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for Tungsten(VI) Chloride

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