Phosphorus peroxides symmetrical

Numerous sulfur and phosphorus peroxy compounds such as monopersulfuric acid (Caro s acid, la), monopersulfate (Oxone, Ib), ammonium monopersulfate Ic, tetra n-butyl-ammonium monopersulfate Id, peroxydisulfates 2a and 2b", tetra n-butylammonium peroxydisulfate 2c, symmetrical bissulfonyl peroxide 3 , acyl sulfonyl peroxide 4 , unsymmetrical sulfonyl peroxide 5 , sulfinyl peroxy intermediates 6a, sulfonyl peroxy intermediate 6b, sulfonimidoyl peroxy intermediate 7, bis(diphenyl phosphinyl) peroxide 8 , unsymmetrical phosphorus peroxide 9 and phosphoranyl peroxy intermediate 10" are known. Recently, many researchers have shown interest in the preparation and... 

The only symmetric phosphorus peroxide reported is bis(diphenylphosphonyl) peroxide 8. It is prepared by condensation of diphenylphosphinyl chloride with sodium peroxide (equation 94). When the same procedure was applied for substituted arenephosphinyl chlorides, no peroxide was observed. Peroxide 8 is stable at —80 °C and decomposes at room temperature. 

Phosphorus peroxides, 1039-46 symmetrical, 1041-2 unsymmetrical, 1042-4 Photocalorimetry, ozonides, 165 Photochemistry... 

Oxidation of stabilized phosphorus ylides. 3-Carotene and other symmetrical carotenoids can be prepared conveniently by oxidation of phosphorus ylides with hydrogen peroxide (307o) and sodium carbonate in aqueous solution. ... 

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