Preparation of lower transition metal fluorides by reduction on a heated filament

Falconer, W. E.; Jones, G. R.; Sunder, W. A.; Haigh, I.; Peacock, R. D.

doi:10.1016/0022-1902(73)80442-7

Cited by 13 publications

(1 citation statement)

References 7 publications

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“…Prior to this work the pentafluorides MFs, M = Re, Os, and Ir, have been prepared from the reactions of ReFs10 and OsFe11 with W(CO)e, ReFe with PF3,12 OsFs with IFs or light,11 IrFs with glass,13 and ReFe and OsFs with a hot filament. 14 The tetrafluorides have been prepared from the reactions of IrFs with a hot filament,14 thermal decomposition of OsFs15 and ReFs,10 decomposition of ReFs over Re,16 and the reaction of ReFs10 and OsFs11 with W(CO)s. Not one of the reaction types, however, has been found to be general or to give high yields.…”

Section: Resultsmentioning

confidence: 99%

Reductive syntheses of transition metal fluoride compounds. Synthesis of rhenium, osmium, and iridium pentafluorides and tetrafluorides

Paine¹,

Asprey²

1975

Inorg. Chem.

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Section: Resultsmentioning

confidence: 99%

Reductive syntheses of transition metal fluoride compounds. Synthesis of rhenium, osmium, and iridium pentafluorides and tetrafluorides

Paine¹,

Asprey²

1975

Inorg. Chem.

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Tungsten Compounds

Penrice

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Tungsten combines with many other elements to form simple stable compounds. It readily polymerizes but the chemistry of aqueous solutions is very complex. This is exemplified by the large number of polytungstates. The chemical uses of tungsten have increased substantially in more recent years. The hexacarbonyl has potential as a lubricant additive and as a dye and pigment. The halides are useful as a starting materials in the chemical vapor deposition of tungsten. The oxides are important intermediate products in the stepwise reduction in hydrogen to the metal. Tungsten bronzes constitute a series of well‐defined nonstoichiometric compounds. The sodium tungsten bronzes are interesting not only for their intense color range but exhibit both positive and negative coefficient of resistance as the sodium:tungsten ratio changes. Sodium tungsten bronzes help the catalytic oxidation of carbon monoxide and reformer gas in fuel cells. The tungstates are an important class of materials. The metatungstates are important starting materials for production of tungsten catalysts because of the high solubility in water. Ammonium paratungstate is the intermediate material of choice between chemical recovery from ores and the reduction to tungsten metal. The interstitial compounds, particularly with carbon, represent the largest application for tungsten in cemented carbides. Tungsten compounds, especially the oxides, sulphides, and heteropoly complexes, form stable catalysts for a variety of chemical processes in the petroleum industry and in chemical synthesis. Other uses include fireproofing of textiles, as additives in lubricants and antifreeze solutions, in inks and dyes, as phosphors in fluorescent lights, and for improvement of conductivity of tin oxide coatings on aircraft windows. Because soluble tungsten compounds show varying degrees of toxicity, exposures in the workplace are regulated.

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Tungsten Compounds

Penrice

2001

Kirk-Othmer Encyclopedia of Chemical Technology

View full text Add to dashboard Cite

Tungsten combines with many other elements to form simple stable compounds. It readily polymerizes but the chemistry of aqueous solutions is very complex. This is exemplified by the large number of polytungstates. The chemical uses of tungsten have increased substantially in more recent years. The hexacarbonyl has potential as a lubricant additive and as a dye and pigment. The halides are useful as starting materials in the chemical vapor deposition of tungsten. The oxides are important intermediate products in the stepwise reduction in hydrogen to the metal. Tungsten bronzes constitute a series of well‐defined nonstoichiometric compounds. The sodium tungsten bronzes are interesting not only for their intense color range but exhibit both positive and negative coefficient of resistance as the sodium:tungsten ratio changes. Sodium tungsten bronzes help the catalytic oxidation of carbon monoxide and reformer gas in fuel cells. The tungstates are an important class of materials. The metatungstates are important starting materials for production of tungsten catalysts because of the high solubility in water. Ammonium paratungstate is the intermediate material of choice between chemical recovery from ores and the reduction to tungsten metal. The interstitial compounds, particularly with carbon, represent the largest application for tungsten in cemented carbides. Tungsten compounds, especially the oxides, sulphides, and heteropoly complexes, form stable catalysts for a variety of chemical processes in the petroleum industry and in chemical synthesis. Other uses include fireproofing of textiles, as additives in lubricants and antifreeze solutions, in inks and dyes, as phosphors in fluorescent lights, and for improvement of conductivity of tin oxide coatings on aircraft windows. Because soluble tungsten compounds show varying degrees of toxicity, exposures in the workplace are regulated.

show abstract

Preparation of lower transition metal fluorides by reduction on a heated filament

Cited by 13 publications

References 7 publications

Reductive syntheses of transition metal fluoride compounds. Synthesis of rhenium, osmium, and iridium pentafluorides and tetrafluorides

Reductive syntheses of transition metal fluoride compounds. Synthesis of rhenium, osmium, and iridium pentafluorides and tetrafluorides

Tungsten Compounds

Tungsten Compounds

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