Molybdenum pentachloride

Molybdenum(V) compounds generally occur as mononuclear or dinuclear species. Molybdenum pentachloride [10241-05-1] MoCl, formed by combination of the elements, serves as a usebil and reactive starting material (Fig. 1). MoCl has a dinuclear stmcture (Fig. 3) in the soHd state but is mononuclear in the gas phase. In solution or in the soHd state the compound, actually Mo2C1 q (Fig- 3a), is readily hydroly2ed in air to form MoOCl ... [Pg.471]

Fig. 3. Representive stmctures for compounds of molybdenum(V) (a) dimolybdenum dodecachloride [26814-39-17, M02CI2Q, the dimer of molybdenum pentachloride (b)pentakis(thiocyanato)oxomolybdenum(V), MoO(NCS)g (c) Mo20 (NCS)g (d) Mo2(S2)g (e) Mo2Sg (f) Mo2S (S2CNR2)2 (g)...

Iodine trichloride Mercuric chloride Mercurous chloride Molybdenum pentachloride... [Pg.256]

See Molybdenum pentachloride Sodium, or Sodium sulfide See Tungsten hexachloride Sodium sulfide... [Pg.1820]

Molybdenum metalworking, 17 10-11 Molybdenum mill products, 17 9-10 Molybdenum-nickel alloys, 17 102 Molybdenum ore, U.S. exports of, 17 3t Molybdenum oxidation states, 17 20 Molybdenum oxides, 17 38 Molybdenum pentachloride, 17 23 Molybdenum-rhenium alloys, 17 15 Molybdenum sulfide, poisons in representative reactions, 5 258t Molybdenum-sulfur complexes, molecular, 17 37... [Pg.599]

Manganese trichloride oxide, 4141 Manganese trifluoride, 4335 Mercury(II) bromide, 0269 Mercury(I) fluoride, 4312 Mercury(II) iodide, 4602 Molybdenum hexafluoride, 4365 Molybdenum pentachloride, 4180 Neptunium hexafluoride, 4366 Osmium hexafluoride, 4370 Palladium tetrafluoride, 4347 Palladium trifluoride, 4341... [Pg.236]

Molybdenum pentachloride (MoGl ) is used as a brazing and soldering flux and to make fire-retardant resins. [Pg.129]

Reactions with chlorine and bromine occur only at elevated temperatures. With chlorine the product is molybdenum pentachloride ... [Pg.583]

Molybdenum pentachloride is used as a catalyst in chlorination reactions. It also is used in fire-retardant resins for soldering of flux for deposition of molybdenum coating and to prepare several other molybdenum compounds, including molybdenum oxychlorides and hexacarbonyl. [Pg.595]

Molybdenum pentachloride may be prepared by heating molybdenite in chlorine. Sulfur chloride formed in the reaction is removed by distillation ... [Pg.595]

Molybdenum pentachloride is hydrolyzed readily in water forming an oxychloride, M0OCI3. The reaction proceeds with hissing noise and evolution of heat. [Pg.596]

Molybdenum pentachloride forms mixed complexes and oxychloride adducts with several donors. Thus, the adducts with pyridine, bipyridyl and alkyl nitriles are MoCl4(py)2, MoCRObipy) and MoCR(RCN)2, respectively. [Pg.596]

Elemental composition Mo 35.12%, Cl 64.88%. Molybdenum pentachloride may be identified from its physical properties and the products it forms in various reactions. The molybdenum content may be measured by flame or fur-nace-AA or ICP/AES measurement following digestion with nitric acid and appropriate dilution. [Pg.597]

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... [Pg.232]

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. [Pg.232]

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 ... [Pg.232]

The same configuration has been reported also for molybdenum pentachloride,7 MoCl , antimony pentachloride,80 SbCli, and the tri-methylstibine dihalides,81 (CH ) 3bX. Molybdenum pentachloride... [Pg.178]

Introduction of molybdenum pentachloride (melting point of MoC15, 467 K boiling point, 541 K). [Pg.422]

Despite many attempts it has not been possible to oxidize 2-substituted 1,2,3-triazoles 382 to the corresponding 1-oxides 326. Peracetic acid, 3-chloroperbenzoic acid, dichloropermaleic acid, trifluoroperacetic acid, peroxydisulfuric acid, and f-pentyl hydrogen peroxide in the presence of molybdenum pentachloride all failed to oxidize 382 (1981JCS(P1)503). Alkylation of 1-hydroxytriazoles 443 invariantly produced the isomeric 3-substituted 1,2,3-triazole 1-oxides 448 (see Scheme 132). However, the 2-substituted 1,2,3-triazole 1-oxides 326 can be prepared by oxidative cyclization of 2-hydroxyiminohydrazones (1,2-hydrazonooximes, a-hydrazonooximes) 345 or by cyclization of azoxyoximes 169. Additional methods of more limited scope are reaction of nitroisoxazoles 353 with aryl-diazonium ion and base, and reaction of nitroimidazoles 355 with hydroxy-amine- or amine-induced rearrangement of nitro-substituted furoxanes 357. [Pg.61]

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