Tungsten Compound
Introduction
Tungsten compounds are mainly used for producing tungsten and tungsten carbide, especially the important raw materials of tungsten carbide.
Ethanol Tungsten
Ethanol tungsten is a brown liquid similar to ethanol alcohol, a halogen compound, little toxicity to water; it should be stored in a container filled with dry inert gas and placed in the cool, dry place.
Tungsten(VI) Isopropoxide
Chinese Name:异丙醇钨(VI) English Name：Tungsten(VI) isopropoxide English Aliases：Tungsten(6+) hexa(2-propanolate) CAS NO.：52321-90-1 Formula：C18H42O6W Molecular Weight：538.36200
Tungsten Diselenide
The major structural of tungsten diselenide are two layers of selenium atoms on both upper and lower connect with a layer of tungsten atoms middle, its thermal conductivity is about one hundred thousandth of the best thermal conductivity--diamond 10 parts per million making it the world's lowest thermal conductivity material.
Tungsten Silicide
Tungsten silicide is a blue-gray, quartet and odorless crystalline, insoluble in water and aqua regia, but it can dissolve in a mixture solution of nitric and hydrofluoric acid. Tungsten silicide can be used for making anti-oxidation coating layer and resistance wire poultice.
Tungsten Ditelluride
Tungsten ditelluride (WTe2) is a transition metal chalcogenide having a layered structure, in which tungsten chain distributes in one-dimensional along the tellurium layer a-axis direction; it has good thermoelectric properties and is a semi-metallic non-magnetic material.
Boranylidyne Tungsten
Boranylidyne tungsten, a silver white octahedral, its melting point is 2900 ℃, insoluble in water, but can dissolve in aqua regia and some concentrated acid; it can decomposite when heated to 100 ℃ in the chlorine, can be generated by directly heating tungsten and boron, also it can used as refractory material.
Boranylidyne(λ2-Boranylidene) Tungsten
Boranylidyne tungsten molecular weight:428.79100 Exact mass:430.00300,melting point：210-214°C,can be obtained by sintering 2mol and tungsten 5mol boron powder at 1200~1300℃ in vacuum or argon atmosphere.
Tungsten Dichloride
Tungsten dichloride is a light gray powder with amorphous non-crystalline, easily formed octahedral groups. It is an important raw material for new applications.Tungsten dichloride is very unstable in air and easily oxidized. It will decompose at 500 ℃, or even oxidized by water and release of hydrogen.
Bis(Cyclopentadienyl)Tungsten Dichloride
Bis(cyclopentadienyl)tungsten dichloride appears in pale yellow or light brown, can be prepared by dihydro bis (cyclopentadienyl) tungsten reacts with chloroform, is the intermediate in the preparation of organic tungsten compounds.
Tungsten Dichloride Dioxide
Tungsten dichloride dioxide,thin yellow platelets with acutely toxic, can cause corrosive to the skin and mucous membranes. It is stable under normal temperature and pressure, and should be get rid of materials such as moisture or wet oxide, alkali metal, is sensitive to atmospheric moisture.
Tetrachloro Tungsten
Tetrachloro tungsten appears in black, its hygroscopic is weaker than tungsten pentachloride , but hydrolysis in the water. Not melted or sublimated even heated, but if strong burned in vacuum and reached to decomposition temperature, it will decompose.
Tungsten Pentachloride
Tungsten pentachloride is a flash dark green crystal, easily decomposed when exposed in the air. It is very sensitive to moisture and water, which shows it generates green surface film in the air, and produces W2O5 in the water.
Tungsten Hexachloride
Tungsten hexachloride is a dark blue or blue-purple crystal, can be used for vapor deposition of tungsten coated, preparing a single crystal tungsten wire, the conductive layer on the glass surface and as olefin polymerization catalyst, also it can be used in organic synthesis and purifying tungsten.
Tungsten Hexafluoride
Tungsten hexafluoride, a colorless gas or light yellow liquid; and when it cames to solid, it appears in a white crystal which is easy deliquescence,also it produces smoke in the moist air. Tungsten hexafluoride is mainly used for chemical vapor deposition of tungsten, or as a fluorinating agent. Its melting point is 2.3 ℃, can soluble in most organic solvents, capable of reacting with hydrofluoric acid.
Tungsten Disulfide
Tungsten disulfide appears in gray, hexagonal, layered structure with anti-magnetic and semiconductor, easy dissociation, has lubricating properties similar to graphite which makes it a lubricant, such as an aerosol. It is melting point is 1480ºC, slightly soluble in cold water, soluble in hot water, but insoluble in hydrochloric acid and alkali; soluble in molten alkali, insoluble in alcohol.
Tungsten Tetraiodide
Tungsten tetraiodide is the black powder,easy hydrolysis and oxidized, will decomposed in thermal (no fixed melting or boiling point), generate tungsten diiodide and iodine when heated in air。
Cobalt(II) Tungsten Oxide
Cobalt(II) tungsten oxide is a gray powder, its density is 8.42g/cm3, and the hazard category code is R20/21/22.
Tetracarbonyl Tungsten
The melting point of tetrahydroxy tungsten is 220ºC, the synthesis route as 1,1'-bis (diphenylphosphino) ferrocene+tungsten hexacarbonyl→(1,1'-bis (diphenylphosphino) ferrocene) tetracarbonyl tungsten.
Hexacarbonyl Tungsten
Hexacarbonyl tungsten is a coordination compound with the formula W (CO) 6 , a colorless solid, similar to congeners hexacarbonyl chromium and hexacarbonyl molybdenum, a material which is volatile and stable in air; besides, tungsten atoms in hexacarbonyl tungsten is zero-valent.
Chloro (Hydrido) Tungsten
The melting point of chloro (hydrido) tungsten is 195ºC，and its molecular weight is 349.47900.
2-Butylcyclopenta-1,3-Diene, Diiodotungsten
The molecular weight of 2-butylcyclopenta-1,3-diene,diiodotungsten is 680.04800, its melting point is 112-116ºC.