Potassium permanganate, reaction with

Potassium permanganate reacts with hydrogen peroxide in dilute sulfuric acid to form manganous sulfate, potassium sulfate, and evolving oxygen. A molecular equation for this reaction is ... 

A base-catalyzed, elimination reaction was a key step in a synthesis of D-ribose from L-glutamic acid.188 In that work, L-glutamic acid was converted, by a series of reactions, into 5-0-benzyl-2,3-dideoxy-D-glycero-pentofuranose (157) from compound 157, a mixture of glycosides was obtained which, on treatment with bromine and calcium carbonate, gave the monobromo derivative 158 as a mixture of diastereoisomers. Base-catalyzed dehydrobromination of 158 afforded the unsaturated derivative 159. Hydroxylation of 159 with potassium permanganate or with osmium tetraoxide gave a mixture of methyl 5-0-benzyl-/3-D-ribofuranoside and methyl 5-O-benzyl-a-D-lyxofuranoside. 

The reaction may be followed by thin-layer chromatography. The ratio of the Rf values for cyclohexene and c/s-diol 2 is 2 1 (commercial silica gel plates, ethyl acetate). The plates are best visualized by first spraying with 1 % aqueous potassium permanganate, then with methanolic sulfuric acid, followed by charring with heat. The checkers found that, if the procedure is followed exactly, monitoring the reaction by thin-layer chromatography is unnecessary. 

Add a potassium permanganate solution to one of an iron(II) salt acidified with sulphuric acid. What happens Write the equations of the reactions of an iron(II) salt with potassium permanganate and with potassium dichromate. Will an iron(ll) salt be oxidized by chlorine, bromine, and iodine water (see Appendix 1, Table 21) How do iron(II) salts react with hydrogen sulphide and ammonium sulphide ... 

The key to the oxidation-number method of balancing redox equations is to realize that the net change in the total of all oxidation numbers must be zero. That is, any increase in oxidation number for the oxidized atoms must be matched by a corresponding decrease in oxidation number for the reduced atoms. Take the reaction of potassium permanganate (KMn04) with sodium bromide in aqueous acid, for example. An aqueous acidic solution of the purple permanganate anion (Mn04 ) is reduced by Br- to yield the nearly colorless Mn2+ ion, while Br- is oxidized to Br2. The unbalanced net ionic equation for the process is... 

Oxidation with Potassium Permanganate.—Oxidation with potassium permanganate of 2- and 3-desoxyhexose monomethyl ethers, obtained from the cardiac glycosides or by synthesis, has been employed extensively by Reichstein and his colleagues, since valuable information on the structures of the sugars is thereby provided. This reaction results in the formation from either a 2-desoxyhexose 3-methyl ether or a 3-desoxyhexose 2-methyl ether, of one of the isomers of methoxysuccinic acid, which is usually isolated as the diamide. 

SAFETY PROFILE A highly corrosive irritant to the eyes, skin, and mucous membranes. Mildly toxic by inhalation, Explosive reaction with alcohols + hydrogen cyanide, potassium permanganate, sodium (with aqueous HCl), tetraselenium tetranitride. Ignition on contact with aluminum-titanium alloys (with HCl vapor), fluorine, hexa-lithium disilicide, metal acetylides or carbides (e.g., cesium acetylide, rubidium ace-tylide). Violent reaction with 1,1-difluoro-ethylene. Vigorous reaction with aluminum, chlorine + dinitroanilines (evolves gas). Potentially dangerous reaction with sulfuric acid releases HCl gas. Adsorption of the acid onto silicon dioxide is exothermic. See also HYDROGEN CHLORIDE (AEROSOL) and HYDROCHLORIC ACID. 

The reaction of 2-methyl-, 2,5-dimethyl-, and 2,2,5--trimethyl-phosphorinan-4-one with hydrogen peroxide or potassium permanganate, or with sulphur or selenium in a suitable solvent on boiling affords the corresponding 1-oxide, -sulphide, or -selenide in good yield (I.N. Azerbaev et at., ibid., 1976, 47). For the preparation, reactions, and... 

Non-peer-reviewed publications are still available on the isotopic effects related to the two main abiotic pathways for ethers, oxidation and hydrolysis under acidic conditions. However, preliminary results on isotopic fractionation associated with the reaction of potassium permanganate (KMn04) with MTBE showed a carbon enrichment factor between -4.2 and -4.9%o [18]. These eC values seem higher than the ones reported upon aerobic biodegradation of MTBE (from -0.28 to -2.4%o) suggesting potentially different reaction pathways and opening new lines of research and discussion for the future. 

CAMPHORONE (76-22-2) CjoHi O Combustible solid [explosion limits in air (vol %) 0.6 to 3.5 flash point 155°F/66°C Fire Rating 2]. Violent reaction with strong oxidizers, chromic anhydride, potassium permanganate. Incompatible with chlorates, naphthalene, 2-naphthol, dichlorobenzene. Flow or agitation of substance may generate... 

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