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Molybdenum disulfide (or moly) is an inorganic compound composed of molybdenum and sulfur. Its chemical formula is MoS 2. The compound is classified as a transition metal dichalcogenide. It is a silvery black solid that occurs as the mineral molybdenite, the principal ore for molybdenum. [6] MoS 2 is relatively unreactive.
In its pure form, molybdenum is a silvery-grey metal with a Mohs hardness of 5.5 and a standard atomic weight of 95.95 g/mol. [18] [19] It has a melting point of 2,623 °C (4,753 °F), sixth highest of the naturally occurring elements; only tantalum, osmium, rhenium, tungsten, and carbon have higher melting points. [12]
Molybdenum nitride can be synthesized through various methods, [2] [3] including: Direct nitridation: Molybdenum metal can react with nitrogen gas at elevated temperatures to form Mo 2 N. Ammonolysis : Molybdenum precursors, such as molybdenum oxides or molybdates, can be treated with ammonia gas or ammonia-containing solutions to produce ...
The agriculture industry uses 500 tons per year as a fertilizer. In particular, its use has been suggested for treatment of whiptail in broccoli and cauliflower in molybdenum-deficient soils. [4] [5] However, care must be taken because at a level of 0.3 ppm sodium molybdate can cause copper deficiencies in animals, particularly cattle. [3]
Molybdenum(II) acetate is a coordination compound with the formula Mo 2 (O 2 CCH 3) 4. It is a yellow, diamagnetic , air-stable solid that is slightly soluble in organic solvents. Molybdenum(II) acetate is an iconic example of a compound with a metal-metal quadruple bond .
Molybdenum hexacarbonyl (also called molybdenum carbonyl) is the chemical compound with the formula Mo(CO) 6. This colorless solid, like its chromium , tungsten , and seaborgium analogues, is noteworthy as a volatile, air-stable derivative of a metal in its zero oxidation state.
MoCl 5 is prepared by chlorination of Mo metal but also chlorination of MoO 3. The unstable hexachloride MoCl 6 is not produced in this way. [5] MoCl 5 is reduced by acetonitrile to afford an orange acetonitrile complex, MoCl 4 (CH 3 CN) 2. This complex in turn reacts with THF to give MoCl 4 (THF) 2, a precursor to other molybdenum-containing ...
Ammonium heptamolybdate is the inorganic compound whose chemical formula is (NH 4) 6 Mo 7 O 24, normally encountered as the tetrahydrate.A dihydrate is also known. It is a colorless solid, often referred to as ammonium paramolybdate or simply as ammonium molybdate, although "ammonium molybdate" can also refer to ammonium orthomolybdate, (NH 4) 2 MoO 4, and several other compounds.