Tungsten -chloride

The amount of tungsten chloride generated in Reaction (1) is a function of the surface area of the tungsten chips and will be gradually reduced as the reaction proceeds and will eventually stop when all the metal has been chlorinated. 

Test the reaction of molybdenum pentachloride (tungsten hexachloride) with water. What is observed What class of chemical compounds should the molybdenum and tungsten chlorides be related to ... 

Table IV lists specific examples of compounds related through this form of dimensional reduction, By far, the majority of these are zirconium chloride and iodide phases, in which case lower main group and even transition metals have been found to incorporate as interstitial atoms. A few analogues are known with hafnium (135), and very recently it has been shown that nitrogen can be substituted for carbon in tungsten chloride clusters adopting the centered trigonal-prismatic geometry (see Fig. 2) (32). It is hoped that a variability similar to that exposed for the octahedral zirconium clusters will be attainable for such trigonal-prismatic cluster phases.

In 1988, Tilley and coworkers first succeeded in the synthesis of a ruthenium-silene complex by the reaction of Cp Ru(PR3)Cl with a Grignard reagent, and the structure was confirmed by X-ray crystallography (Eq. 9) [10]. They later synthesized an iridium complex in a similar manner (Eq. 10) [11]. Berry synthesized a tungsten-silene complex by treatment of a tungsten-chloride complex with Mg (Eq. 11) [12]. Although reactions of transition metal-silene complexes with Mel, HX, and MeOH have been reported, little is known about their reactivities [11,12]. 

Other methods of extraction are applicable on a smaller scale. When a mixture of powdered ore and quartz is heated in a stream of carbon tetrachloride vapour, a distillate is obtained of tungsten chloride, wliich may be decomposed by acid (see p. 270). Solutions of tungstates, such as are obtained as a by-product from zinc minerals containing tungsten, may be decomposed with hydrochloric acid. ... 

The trioxide remains unchanged when heated in a current of nitric oxide it is reduced to lower oxides by ethylene or acetylene at red heat, by methane at a higher temperature, and by phosphine at 125° to 150° C. Heated with phosphorus pentachloride in an atmosphere of carbon dioxide it yields a red-brown product which consists of a mixture of tungsten chlorides and oxychlorides. ... 

Potassium Tungstocyanide, K4[W(CN)g].2H20, may be prepared by the action of potassium carbonate on the cadmium salt, or by treating a solution of potassium tungsten chloride, KjWjClg, with potassium cyanide. It yields light yellow microscopic prisms, which... 

Titanium chloride oxide (TiOClg) Sulfuryl chloride (SOgClg) Tungsten chloride oxide (WO2CI2) Tungsten chloride oxide (WOgClg) Lead chloride (PbClg)... 

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