Peroxo-molybdates

Peroxide titanate complexes, 25 98 Peroxide value, 20 827 in soap making, 22 736 Peroxidic compounds, 25 42 Peroxoborates, names, CAS numbers, and IUPAC names of, 18 398t Peroxocarbonates, 28 401 Peroxo compounds, 28 392-393, 397 Peroxodisulfate ion, 28 408 Peroxodisulfates, 28 392, 408-410 Peroxodisulfate salts, 28 418 uses for, 28 408-409 Peroxodisulfuric acid, 28 407 408 Peroxohydrate(s), 24 40 28 411—415 of melamine, 28 415 stabilization of, 28 413 Peroxo molybdate complexes, 2 7 22 Peroxomonophosphate ion, 28 403 Peroxomonophosphoric acid, 28 403 Peroxomonosulfates, 28 406 407... 

Peroxo derivatives of polymolybdates and polytungstates were reviewed in 1994.375 The solution chemistry of isopolyoxo(peroxo)molybdates and -tungstates has recently been investigated by 170... 

The (t7 -82)2Mo(0) unit structurally resembles the oxo/peroxo-molybdate units studied extensively by 8tomberg and co-workers in... 

The preparations and properties of several peroxo-molybdate and -tungstate complexes have been investigated, the compounds reported include K2W08 and hydrated salts of the [MO ] (M = Mo or W n = 5—8) anions with the cations Na", Sc ", or Mo peroxo-complexes have been used to... 

A substantial number of Mo peroxo complexes has been structurally characterized. These complexes all have nearly symmetrically side-on-bound peroxide. Among them are mononuclear, dinuclear, tetranuclear and heptanuclear compounds. The tetranuclear and hep-tanuclear complexes are related to the isopoly molybdates. Structural studies have identified... 

In contrast to the preceding reagents, oxidation with H202 catalyzed by molybdate and tungstate salts or Hg(OAc)2,722,723 and the Hg(OAc)2-promoted oxidation with a molybdenum peroxo complex724 can be applied to transform acetylene and terminal acetylenes to glyoxal and a-ketoaldehydes, respectively, in fair to good yields. 

It is possible to speed up aliphatic tertiary amine oxidation by adding tungstate or molybdate catalysts.334 However, for oxidation of aromatic and particularly heterocyclic tertiary nitrogen, a stronger system than hydrogen peroxide alone is required. iV-Oxidation of heterocycles is of pivotal importance in industrial chemical synthesis.335 Catalysed systems have been applied and these are dominated by metal peroxo systems based on molybdenum or tungsten. For example, quinoxaline and pyrazine may be oxidized to mono- or... 

Related peroxo-tungstates and -molybdates (Pli2P02)(M0(02)2]2 (M = W or Mo) were studied as catalysts for H2O2 oxidation of sulfoxides. The selectivity for sulfoxide was low for these catalysts [18]. 

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