Manganate salts reactions

Alkyl hydroperoxides are known to be oxidized to alkylperoxy radicals by cupric, cobaltic, and manganic salts. Although CeIV has not yet been reported to oxidize hydroperoxides and although mechanisms for ionic oxidation of alkoxy derivatives have not been put forward, Reaction 1 is a possible first step. 

In aqueous solution, manganous salts are oxidised to manganese dioxide,6 and if silver nitrate is present as catalyst, to permanganate 0 the latter change constitutes Marshall s reaction. Chromium solutions in a similar manner give rise to chromate,7 even without a catalyst. Ferrous and cerous salts are converted into ferric and ceric salts, respectively, and phosphites are oxidised to phosphates. 

Another interesting example of induced oxidation is the reaction between chromic acid and a manganous salt in the presence of arsenious acid.12 The chromic acid is reduced to a chromic salt, while the manganous salt is oxidised to the manganic state and the arsenious acid to... 

The relation of Mnn oxidised to Asm oxidised is known as the induction factor, and is found to be about 0-5 at the beginning of the reaction, whatever amount of manganous salt may be present but the value diminishes as the action proceeds, for as the chromate concentration falls, the tervalent manganese is reduced by the tervalent arsenic to an increasing extent. The presence of a trace of potassium iodate produces great irregularity in the induction factor and lowers its initial value to about 0-25. 

Reactions and Detection.—Permonophosphorie acid is a strong oxidising agent. It liberates iodine at once from acidified potassium iodide (cf. Caro s acid) and oxidises manganous salts in the cold to permanganates. Hydrolysis in dilute solutions is represented by the equation... 

H. Waelsch I was wondering. Dr. Snoke, if you said that this reaction is specific for magnesium or whether manganous salts also activate the exchange reaction. In our experience, in such types of exchange reactions manganous salts are much more effective than magnesium salts. 

Reactions of Grignard reagents in the presence of manganous salts s. 12, 742... 

Alkah manganate(VI) salts are used as oxidants in synthetic organic reactions (100) and their reactions have been observed to be similar to permanganate, except that manganate(VI) exhibits lower reactivity. Additionally, sohd BaVInO in methylene chloride has been reported to achieve high yields for the oxidation of diols to dialdehydes (101). 

The removal of inorganic salts from reaction mixtures afforded by polymeric materials may be simply and effectively accomplished by dialysis,166 178 after decomposition of remaining periodate with ethylene glycol130 131 or butylene glycol. 161 170 Alternatively, the iodate and periodate ions may be removed as such, or after reduction to free iodine. The iodate and periodate ions have been effectively precipitated by means of sodium carbonate plus manganous sulfate,6 or by lead dithionate,191 barium chloride,24 192 193 strontium hydroxide194 202 or barium hydroxide,203 204 lead... 

Alkali-immobile dye-releasing quinone compounds, 19 293-294 Alkali lignins, 15 19-20 Alkali manganate(VI) salts, 15 596 Alkali manganates(V), 15 592 Alkali-metal alkoxide catalysts, 10 491 Alkali-metal alkoxides, effects of, 14 252 Alkali-metal alkylstannonates, 24 824 Alkali-metal fluoroxenates, 17 329-330 Alkali-metal hydrides, 13 608 Alkali-metal hydroxides, carbonyl sulfide reaction with, 23 622 Alkali-metal metatungstates, 25 383 Alkali-metal perchlorates, 18 211 Alkali-metal peroxides, 16 393... 

Pour a small amount of copper sulphate, silver nitrate, and potassium manganate solutions into three beakers and drop a small piece of white phosphorus into each of them. In 10 or 15 minutes, extract the phosphorus from the solutions. Dry it as indicated above, put it on an iron plate, and heat it. What happens How do the given salts affect white phosphorus How can the different activity of white and red phosphorus be explained Write the equations of [the [reactions. 

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