Oxoacids phosphorus

Formation of Phosphorus Oxoacids with P-P-P-P-P-P and P-P-P-P-P Frameworks and Related Compounds... 

Charges of anionic species of phosphorus oxoacids were determined by an ion-exchange equilibrium method. For this purpose distribution ratios, D, of phosphorus oxoacid between an anion-exchange resin Dowex 1x4 phase and an aqueous solution phase containing tetramethylammonium chloride as a supporting electrolyte were obtained from the absorbancies of phosphorus oxoacid in the aqueous solution phase before and after equilibration. D was defined as the ratio of the concentration of phosphorus in the resin phase to the concentration of phosphorus in the solution phase. 

All the protons of except one of two protons at the end Pff-unit are considered from the dissociation behavior of other known phosphorus oxoacids to be completely dissociated at neutral pH (1). Therefore, P may have a charge of about -6 under the present experimental conditions. ... 

It was very difficult to obtain the new compound of P d or P d as a solid salt, because a very small amount of P d or P d was present in very dilute aqueous solution. However, the preparation of a small volume of P d solution of relatively high concentration was successfully achieved by the following procedure the enrichment of phosphorus oxoacid species into a certain amount of an anion-exchange resin and the subsequent elution with a calculated volume of potassium chloride solution of a proper concentration. By adding small volumes of magnesium chloride solution and methyl alcohol to the resulting P d solution, 4 mg of magnesium salt of Pgd was obtained. 

Caution. Since many of the fluoro derivatives of phosphorus oxoacids are known to be extremely toxic, all products of this reaction should be handled with care. 

L. Vdciauskas, C.C. de Araujo, K.-D. Kreuer, Proton conductivity and diffusion in molten phosphinic acid (H3PO2) the last member of the phosphorus oxoacid proton conductor family, Sohd State Ionics 212 (2012) 6—9. 

Phosphorus Oxoacids and Oxoanions The two common phosphorus oxoacids are phosphorous acid (note the change in spelling) and phosphoric acid. 

Meek, S.E. and Pietrzyk, D.J., Liquid chromatographic separation of phosphorus oxoacids and other anions with post column indirect fluorescence detection by alurninium-morin. Analytical Chemistry 60,1397,1988. 

Table 11.4 Common phosphorus oxoacids and their anions...

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