Tungsten pentachloride

The xi hite hydrate, H2WO4.H2O, is produced by the decomposition of tungsten pentachloride, or the oxj chlorides, in presence of moist air. ... 

U03 H20 URANIUM TRIOXIDE MONOHYDRATE 1752 WCI5 TUNGSTEN PENTACHLORIDE 1794... 

U03 2H20 URANIUM TRIOXIDE DIHYDRATE 1753 WCI5[g] TUNGSTEN PENTACHLORIDE (GAS) 1794... 

Roscoe discovered tungsten pentachloride and pentabromide, uranium pentachloride,2 and niobium trichloride (which he found gave NbOClg and CO when heated in COg). He determined the vapour densities of PbClg and TlCl, showed that Delafontaine s supposed new rare-earth metal philippium is a mixture of yttrium and terbium, and redetermined the atomic weight of carbon (C = 12 002). Roscoe published several papers and a book on spectrum analysis. 

Reaction of pentafluorophenyl-lithium with tungsten pentachloride in diethyl ether yields the bright-green complex LiW(C,F5)5,2Et,0, which is stable for several months at -10 °C, and decomposes only slowly at room temperature. It yields (C F5)2Hg with mercuric chloride, CeFsI with iodine, and is hydrolysed to pentafluorobenzene. When heated to 100 °C it gives pentakis(pentafluorophenyl)tungsten as an orange-red solid in low yield and a tungsten(iv) derivative, (C,F5)iW, may be formed, but is too unstable to isolate. ... 

Chromyl azide chloride Molybdenum azide pentachloride Molybdenum azide tetrachloride Silver azide chloride Tin azide trichloride Titanium azide trichloride Tungsten azide pentabromide Uranium azide pentachloride Vanadium azide dichloride Vanadyl azide tetrachloride... 

See Molybdenum pentachloride Sodium, or Sodium sulfide See Tungsten hexachloride Sodium sulfide... 

Preparation of Molybdenum Pentachloride and Tungsten Hexachloride. Perform the experiment in a fume cupboardX) Assemble an apparatus as shown in Fig. 131. Pour a little concentrated sulphuric acid into wash bottles 1, 2, and 3. Put a layer of glass wool... 

Fig. 131. Apparatus for preparing molybdenum pentachloride and tungsten hexachloride...

Fill the apparatus with chlorine and perform chlorination of the molybdenum, heating the place of the tube where the metal is with the flame of a burner to 200-300 °C. What colour do molybdenum pentachloride and tungsten hexachloride have If oxychlorides are produced together with the molybdenum(V) or tungsten(VI) chlorides, distil them off in a chlorine stream. Transfer the product into a weighed test tube with a stopper, weigh it, and hand it in to your instructor. Calculate the yield in per cent. 

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 ... 

Among die best known simple pentavalent tungsten compounds are the pentachloride, WOE. and the pentabromide, WBr . As is true of tungsten(IV), tungsten(V) forms complexes. 

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