Peroxomonophosphoric acid

H3POS peroxomonophosphoric acid HTCO4 pertechnetic acid... [Pg.221]

Peroxophosphoric Acids and Their Salts. In its usual impure form (H PO is the main contaminant), peroxomonophosphoric acid [13598-52-2] (5), is a viscous, coloress Hquid. The three ionization constants for peroxomonophosphoric acid are pifj = 1.1, P-A2 = 5.5, and pK (peroxide proton) = 12.8 (44). Oxidations comparable to those of peroxomonosulfuric acid, H2SO, occur in acid solutions of ca pH 2, but at higher pH values, H PO becomes less reactive as an oxidant and more unstable with respect to decomposition (44). The stmcture of H PO is probably similar to that of... [Pg.93]

Peroxomonophosphoric acid can be prepared by the hydrolysis of peroxodiphosphates ia aqueous acid and by the reaction of hydrogen peroxide with phosphorus pentoxide (45). It is not produced or used commercially and the salts that have been prepared are unstable and impure. [Pg.94]

P-A4 = 7.7 (47). The rates of hydrolysis of the peroxodiphosphate ion are dependent on both pH and temperature, eg, as the hydrogen ion concentration iacreases, the rate iacreases (48). Peroxodiphosphoric acid hydroly2es to peroxomonophosphoric acid according to the foUowiag equation ... [Pg.94]

This reaction takes place ca 50 times more rapidly than the one ia which peroxomonophosphoric acid hydroly2es to hydrogen peroxide ... [Pg.94]

Peroxomonophosphoric Acid, h3o5p Ignition when an 80% soln contacts org material H.M. Castrantas et al, Fire and Explosion Hazards of Peroxy Com pounds , A3TM Special Publ No 394, Phila (1965), 5... [Pg.673]

Peroxomonophosphoric acid and peroxodiphosphoric acid have both been used to oxidize sulphoxides to sulphones. [Pg.977]

Peroxomonophosphoric acid (PMPA) oxidizes dimethyl sulphoxide in high yield in water and aqueous ethanol . In neutral solution the reaction mechanism was thought to be very complex but actually occurs by two different mechanisms that are very similar to those for sulphoxide oxidation by peracids in acidic and basic media. In an alkaline medium the mechanism involves nucleophilic attack by a phosphorus-containing species (probably POs ) on the sulphur atom of the sulphoxide, followed by O—O bond scission yielding the sulphone (equation 24). In acidic solution, on the other hand, the sulphoxide is the nucleophilic species as detailed in equation (25). It should be noted however that there is some evidence that these mechanisms are oversimplified since there are other nucleophilic species (such as H2P05 and HPO ") present in aqueous solutions of PMPA over a wide pH range . [Pg.978]

The extremely violent interaction of phosphorus(V) oxide and cone, hydrogen peroxide to give peroxomonophosphoric acid may be moderated by using acetonitrile as a diluent. [Pg.1640]

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... [Pg.684]

Peroxodisulfuric acid, 4482 Peroxomonophosphoric acid, 4506 Peroxomonosulfuric acid, 4481 Peroxonitric acid, 4437... [Pg.331]

Oximino-4,5,6,7-tetrahydrobenzofmazan 77-oxide, 2357 Pentaamminedinitrogenruthenium(II) salts, 4596 Pentafluoroorthoselenic acid, 4354 Pentanesulfonic acid, 2020 Perfluoro-/er/-butanol, 1380 Peroxomonophosphoric acid, 4506 2-Phenyl-l,l-dimethylethyl hydroperoxide, 3332 77-Phenylhydroxylamine, 2356... [Pg.336]

Peroxodisulfuric acid, 4476 Peroxomonophosphoric acid, 4501 Peroxomonosulfuric acid, 4475 Peroxonitric acid, 4431 Peroxyacetyl perchlorate, 0733 Peroxybenzoic acid, 2729... [Pg.2123]

Peroxomonophosphoric Acid, Ignition when an 80% soln H.M. Castrantas et al, Fire and... [Pg.674]

Oxygen-substituted compounds — peroxomonophosphate The hydrolysis of peroxomonophosphoric acid (H3PO5), viz. [Pg.317]

Schmidlin and Massini (1910) obtained a peroxomonophosphoric acid, H3PO5, presumably... [Pg.388]

C.P. Patnaik, S.N. Mohapatro, A.K. Panigrahi, R.S. Panda (1987). Peroxy acid oxidations. 1. A kinetic and mechanistic study of the oxidation of acetylacetone by peroxomonophosphoric acid and hydrogen peroxide in alkaline medium. Bull. Chem. Soc. Jpn., 60, 3391-3395. [Pg.286]

Interest has been shown in the oxides of dicyclopentadiene, as noted earlier, with reports of epoxidations using permaleic, perphthalic, " and peracetic acids. The mechanism of oxidation of fran -stilbene by peroxomonophosphoric acid (H3PO5) in a number of solvents has been investigated. A report on the epoxidation of a number of methoxy- and hydroxy-substituted cinnamaldehydes (24 R = = H, MeO, or OH) concludes with the suggestion that the... [Pg.5]

The kinetics of oxidation of bivalent manganese to the heptavalent state by peroxomonophosphoric acid has been investigated/ " In perchloric acid, the reaction rate is negligible without the addition of an appropriate catalyst. Trace quantities of Co(II) increase the observed reaction rate significantly the resulting rate law and mechanism are shown in equations (46)-(53). The oxidation was... [Pg.89]

Peroxomonophosphoric acid (PMPA) oxidizes anthranilic acid and p-aminobenzoic acid in aqueous acid to the azoxy compounds, via nucleophilic attack of the unprotonated nitrogen group on the peroxo oxygen. " The same authors also report on the oxidation of 3-aminopyridine by PMPA. ... [Pg.93]

The oxidations of peroxomonophosphoric acid are considered to take place via nucleophilic displacement of the peroxide oxygen and the activated complex may be represented as (15). The reaction with HaPOa is much slower than for the substrates... [Pg.97]

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