Permanganate, potassium salt

The most important manganese(V) compound is K MnO, a key intermediate in the manufacture of potassium permanganate. Potassium manganate(V) is an easily crystallized salt obtained by reduction of potassium permanganate using sodium sulfite in strong sodium hydroxide solution. This was the first compound to be recognized as exclusively pentavalent. 

Permanganic Acid, Potassium Salt, Registry of Toxic Effects of Chemical Substances, RTECS Number SD6475000, May 1993. 

Alkanolamines can be oxidized with various oxidiziag agents. With acidic potassium permanganate or excess potassium hydroxide, the potassium salts of the corresponding amino acid are obtained... 

CIS of potassium permanganate in 2000 c.c. of water is placed in a, and an emulsion of 100 grams of the hydrocarbon in 600 c.c. of water is gradually added in small portions. The mixture is kept cool by means of a current of cold water, and shaken continuously. The oxidation products are then treated as follows The liquid is filtered from manganese oxide, and evaporated to about 1000 c.c., saturated with carbon dioxide, and the neutral and unaltered compounds removed ly extract jn with ether in the usual manner. The crude pinonic acid is separated from its potassium salt by sulphuric acid and is then extracted with ether. If /S-pinene be present, nopinic acid will be present... 

Oxidation of methyl perfluoroalkyl sulphones with refluxing aqueous potassium permanganate produced the perfluorinated alkanesulphonic acid in 85% yield as the potassium salt (equation 86). On the other hand, attempted oxidation with sodium hypochlorite caused only chlorine substitution (equation 87). Reaction of the new sulphone with aqueous hydroxide gave the same perfluoroalkane sulphonic acid salt (equation 88). 

Photolysis, apparatus for, 55, 17 Phthalimide, N-amino- [ 1//-Isoindole-1,3-(2//)-dione, 2-amino-, 55, 115 Potassium rew-butoxide [2-Propanol, 2-methyl-, potassium salt], 55,12, 13 Potassium iodide, 55, 71 Potassium permanganate [Permanganic acid, potassium salt], 55,68 Propane, 2,2 dimethyl 1 phenyl, 55, 112 Propane, 2 isocyano-2-methyl-, 55, 96... 

Pentynoic acid, methyl ester, 55, 76 Permanganic acid, potassium salt [Potassium... 

Calcium permanganate is a more active oxidant than the potassium salt, and ignites paper or cotton on contact. 

The physical properties of many macrocyclic polyethers and their salt complexes have been already described. - Dibenzo-18-crown-6 polyether is useful for the preparation of sharpmelting salt complexes. Dicyclohexyl-18-crown-6 polyether has the convenient property of solubilizing sodium and potassium salts in aprotic solvents, as exemplified by the formation of a toluene solution of the potassium hydroxide complex (Note 13). Crystals of potassium permanganate, potassium Lbutoxide, and potassium palladium(II) tetrachloride (PdClj + KCl) can be made to dissolve in liquid aromatic hydrocarbons merely by adding dicyclohexyl-18-crown-6 polyether. The solubilizing power of the saturated macrocyclic polyethers permits ionic reactions to occur in aprotic media. It is expected that this [)ropcrty will find practical use in catalysis, enhancement of... 

Synonyms permanganic acid potassium salt chameleon mineral... 

The now classic example of this type, excluding nucleophilic substitution reactions, is the solubilization of potassium permanganate in benzene by [18]crown-6 derivatives. The resulting solution proved a mild and efficient oxidizing agent for many organic compounds. For example, a-pinene is oxidized to cw-pinonic acid in 90% yield (Scheme 8) in contrast to a 40-60% yield in aqueous solution. An additional advantage is that the products of these reactions (e.g. potassium salt of cw-pinonic acid in Scheme 8) are frequently insoluble in the hydrocarbon solvents and consequently are unable to react further. 

Potassium permanganate Permanganic acid (HMn04), potassium salt (8,9) (7722-64-7)... 

The more finely divided the manganese dioxide the more rapid will be the reaction, so that the precipitated reagent is better than finely powdered pyrolusite. It is still better to prepare the precipitated hydroxide Mn(OH)4, by reducing the necessary quantity of potassium permanganate in neutral solution with alcohol and washing the precipitate from soluble potassium salts by decantation. 

Potassium permanganate oxidises arsenious acid rapidly and quantitatively in the presence of a trace of potassium iodide, which acts catalytically.7 The reaction takes place in the presence of mineral acid and the use of an indicator or of sodium bicarbonate is unnecessary. The titration may be carried out at any temperature up to 95° C. A slight correction is necessary for the oxidation of the iodide other iodides are less effective than the potassium salt. This method is comparable in accuracy with the iodometric method. 

Oxidation of methyl 3,4-isopropylidene-2-desoxy-a-D-galactoside with potassium permanganate in the presence of potassium hydroxide afforded methyl 3,4-isopropylidene-2-desoxy-a-D-galacturonoside (LXXXIV) as its potassium salt. This could readily be converted into methyl 2-desoxy-a-D-galacturonoside (LXXXV) and both LXXXIV and LXXXV afforded crystalline esters and amides.230 The uronic acid derivative could be reduced by lithium aluminum hydride in ethereal solution to give methyl 3,4-isopropylidene-2-desoxy-a-D-galactoside.230 Although 2-des-... 

Sodium permanganate was used in place of the potassium salt in an experiment to degrade chlorinated materials in oils. Addition of methanol caused a violent reaction, spraying the mix about. The concentration, or acidity, of the material is not stated. However sodium permanganate is far more soluble in water, and presumably methanol, than is the potassium salt. Intimate mixing means more violent reaction. 

Addition of lipophilic crown ethers to inorganic salts such as potassium permanganate, potassium dichromate etc. which are normally insoluble in nonpolar solvents, enables them to smoothly oxidise organic substrates in quantitative yields (Scheme 3.10). In the absence of the macrocycle, yields are extremely poor. 

Picric acid Potassium, metal Potassium permanganate Silver salts, organic Sodium, metal Sulfuric acid, concentrated... 

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