Molybdenum trichloride

Molybdenum trichloride [13478-18-7] M 202.3, m 1027", d 3.74. Boiled with 12M HCl, washed with absolute EtOH and dried in a vacuum desiccator. 

Molybdenum hexafluoride. 3,1412 Molybdenum-iron-sulfur complexes, 4,241 Molybdenum oxide amino acid formation prebiotic systems, 6, 872 Molybdenum storage protein microorganisms, 6, 681 Molybdenum telluride, 3, 1431 Molybdenum tetraalkoxides physical properties, 2, 347 Molybdenum tribromide, 3,1330 Molybdenum trichloride, 3,1330 Molybdenum trifluoride, 3, 1330 Molybdenum trihalides, 3, 1330 bond lengths, 3, 1330 magnetic moments, 3,1330 preparation, 3,1330 properties, 3, 1330 structure, 3,1330 Molybdenum triiodide, 3,1330 Molybdenum trioxide complexes, 3, 1379 Molybdenum triselenide, 3, 143)... 

Molybdenum trichloride is generated in situ from molybdenum pentachlor-ide and zinc dust in aqueous tetrahydrofuran. It is used for conversion of sulfoxides to sulfides [216]. 

Chemical deoxygenation of sulfoxides to sulfides was carried out by refluxing in aqueous-alcoholic solutions with stannous chloride (yields 62-93%) [186 Procedure 36, p. 214), with titanium trichloride (yields 68-91%) [203], by treatment at room temperature with molybdenum trichloride (prepared by reduction of molybdenyl chloride M0OCI3 with zinc dust in tetrahydrofuran) (yields 78-91%) [216], by heating with vanadium dichloride in aqueous tetrahydrofuran at 100° (yields 74-88%) [216], and by refluxing in aqueous methanol with chromium dichloride (yield 24%) [190], A very impressive method is the conversion of dialkyl and diaryl sulfoxides to sulfides by treatment in acetone solutions for a few minutes with 2.4 equivalents of sodium iodide and 1.2-2.6 equivalents of trifluoroacetic anhydride (isolated yields 90-98%) [655]. 

Decammino-dimolybdenum Triamine Trichloride, Mo2(NH2)3 C13.10NH3, is produced by keeping insoluble molybdenum trichloride in contact with liquid ammonia for some days, when the ammine forms as a brown powder which rapidly evolves ammonia on exposure to air, leaving a residue of the triamine, Mo2(NH2)3C13.3... 

The same efect can be seen for molybdenum trichloride oxide,25 where bridge Mo—Cl distances of 2.80 and 2.36 A, trans to oxygen and chlorine respectively, average 2.58 A, and the symmetric bridge distance in molybdenum pentachloride26 is 2.53 A. 

Molybdenum Trichloride, M0CI3, is obtained by reduction of the pentachloride by hydrogen at 250° C. by passing the vapour of the pentachloride over the heated metal or by passing a mixture of the pentachloride vapour and carbon dioxide through a heated tube. It is a reddish-brown amorphous substance, stable in air at ordinary temperatures, but on heating in air decomposes, leaving an impure residue of the diehloride. 

A hydrate of molybdenum trichloride has been stated to exist. By the action of potassium amalgam on a solution of molybdie acid in excess of hydrochloric acid, garnet-red, soluble prisms of the double... 

The pentachloride is a little unstable in air when heated to about 1380° C. or less it leaves a residue of molybdenum when heated in hydrogen at 250° C. it is reduced to amorphous molybdenum trichloride. Its aqueous solution is unstable in air, especially on warming, when hydrogen chloride is more rapidly evolved and the blue oxide (p. 131) remains. Decomposition of its solution in hydrochloric acid also readily takes place. In alcohol and ether it dissolves to a green solution in sulphuric acid its solution is bluish green and in nitric acid colourless alkalies dissolve it with production of the hydrated dioxide and a molybdate. ... 

Molybdenum trichloride [13478-18-7] M 202.3, m 1027", 64 3.74. Boil it with 12M HCl, wash it with absolute EtOH and dry it in a vacuum desiccator. It is a brown-red powder soluble in H2O, EtOH or Et20 and gives a blue solution in cone H2SO4. [Hein Herzog Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1404 7965.]... 

Primary Amines.— The aromatic nitro-to-amine conversion has once again received considerable attention, " especially those reductions which offer selectivity. Thus, dodecacarbonyltri-iron on basic alumina, sodium sulphide in aqueous 1,4-dioxan, triethylammonium formate in the presence of T0% Pd-C, and hydrogenation over a platinum catalyst all effect the nitro-to-amine conversion in the presence of other functionality. Azides and hydrazines are also reduced to aromatic amines by molybdenum trichloride. ... 

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