Tungsten trisulfide

Tungsten trisulfide [12125-19-8] chocolate-brown powder, slightly soluble in cold water, but readily forming a colloidal solution in hot... 

Tungsten trisulfide [12125-19-8], WS3, is a chocolate-brown powder, slighdy soluble in cold water, but readily forming a colloidal solution in hot water. It is prepared by treating an alkah-metal thiotungstate with HC1 (52). Tungsten trisulfide is soluble in alkali carbonates and hydroxides. 

Tungsten trisulfide, WSi, when prepared by heating WS2 in sulfur vapor, is a chocolate-brown powder which bums in air, combines easily with chlor ... 

Chalcogen incorporation was monitored in the syntheses in Scheme 5.10 compound labels 40-44 in this scheme refer to general cluster core configurations without specific reference to terminal ligands. All reactions involved heterometallic clusters prepared from the facially chelated mononuclear molybdenum or tungsten trisulfide species 38 and 39, and from the previously described MoFe3S4 cubane 12-Mo site-specific... 

Tungsten reacts with molten sulfur forming the disulfide, WS2. In excess sulfur the trisulfide, WS3 forms. 

Although thermodynamically possible, the slower rate of substitution of the tungsten(VI) species results in the formation of only a small amount of the corresponding thiotungstate ion, provided that the conditioning period with sulfide ion is controlled. Molybdenum trisulfide is then quantitatively precipitated by the decomposition of the thio salt by the slow addition of sulfuric acid to a pH value of between 2 and 3 ... 

Si5Ni2042W6C56H92 2OH2O, Tungsten, [bis-(nonaaquatetrasulfidonickeltri-)], octakis-(p-toluenesulfonate), icosahydrate, 33 161 SbAgsSs, Antimony trisulfide(3-), trisilver, 33 136... 

Tungsten trioxide and the disulfide (tungstenite ore) are insoluble in H2O. The trisulfide is slightly soluble. Normal tungstates of the alkali metals and Mg are soluble, those of the other metals, slightly soluble to insoluble in H2O. The salt [Co (NH3)6][W (CN)8] is sparingly soluble. 

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