Reactions phosphorus oxides with water

Pour the reaction mixture into the flask of an apparatus for fractional distillation under atmospheric pressure (see Fig. 20). Collect the fraction boiling at 125 °C. Pour the phosphorus thiochloride into a weighed drawn out test tube. Seal the ampoule wear eye protection ). Weigh the ampoule and the remaining parts of the test tube. Write the equation of the reaction. Calculate the yield in per cent. Test the reaction of phosphorus thiochloride with water. Write the equation of the reaction. What is the oxidation state of sulphur in this compound ... 

J. J. Berzelius made phosphorous acid by treating phosphorous oxide with water —a reaction studied by T. E. Thorpe and A. E. H. Tutton, vide supra. B. D. Steele obtained it by the action of iodine on hypophosphorous acid (q.v.) in the presence of mineral acids and A. Besson, by heating the hemioxide with water in a sealed tube at 100° P20+024-3H20=2H3P0k. Phosphorous acid is also produced by the action of hot dil. nitric acid oh phosphorus the objection to this process, said J. Come, is the simultaneous production of phosphoric acid (q.v.), and this the more, the greater the cone, of the nitric acid. T. Salzer, and J. Philipp also reported that some hypophosphoric acid is produced at the same time. The early workers knew that the aq. soln. of phosphatic acid slowly decomposes, giving off phosphine, hence the faint smell like garlic. C. F. Sehonbein mentioned that freshly prepared phosphatic acid contains a trace of nitric acid as well as ozone. A. Tamm also observed that some phosphorous acid is formed when phosphated steel is dissolved in nitric acid. 

Arsenic reacts with oxygen to form oxides analogous to the phosphorus oxides. These arsenic oxides react with water similarly to the phosphorus oxides. Write balanced chemical equations describing the reaction of arsenic with oxygen and the reaction of the oxides with water. 

The spirophosphonium salt (64) is formed, together with some secondary phosphine oxide (65), when phosphorus trichloride is mixed with diphenyl-amine at 210 °C and the reaction mixture treated with water. ... 

White Phosphorus Oxidation. Emission of green light from the oxidation of elemental white phosphoms in moist air is one of the oldest recorded examples of chemiluminescence. Although the chemiluminescence is normally observed from sotid phosphoms, the reaction actually occurs primarily just above the surface with gas-phase phosphoms vapor. The reaction mechanism is not known, but careful spectral analyses of the reaction with water and deuterium oxide vapors indicate that the primary emitting species in the visible spectmm are excited states of (PO)2 and HPO or DPO. Ultraviolet emission from excited PO is also detected (196). 

This reaction is an example of a hydrolysis reaction, a reaction with water in which new element-oxygen bonds are formed. Another example is the reaction ot PC15 (phosphorus oxidation state +5) with water to produce phosphoric acid, H3P04 (also phosphorus oxidation state - -5) ... 

White phosphorus has an autoignition temperature only shghtly above ambient, dispersed it will soon heat itself to that by the slow oxidation responsible for its glow. Red is not spontaneously combustible, however if it does catch fire white will be produced, so that the fire, once extinguished, may spontaneously re-ignite. Both can produce phosphine, among other products, by slow reaction with water. Sealed containers of damp phosphorus (white is often stored under water) may pressurise with highly toxic, pyrophoric, gas mixtures [1]. 

For example, direct treatment of red phosphorus with potassium hydroxide in a mixture of dioxane and water with a phase-transfer catalyst (benzyltriethylammonium chloride) allows direct reaction with primary haloalkanes to form the trialkylphosphine oxide in moderate (60-65%) yield.1415 Allylic and benzylic halides are similarly reported to generate the corresponding tertiary phosphine oxides. When the reaction is performed with a,(o-dihalides, cyclic products are generated only with four- and five-carbon chains the third site... 

From the product analyses of PET reactions of trivalent phosphorus compounds such as phosphines and phosphates, it is found that P reacts with nucleophiles such as water and alcohol to yield phosphine oxides and phosphates [92-95]. During a reaction of triphenylphosphines (P(CgH4-X-/ )3 with water to give phosphine oxides 0=P(C6H4-X-/ )3... 

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