Sodium iodate oxidant

We examined the reaction of triose reductone with both periodate and iodate (55,56), and found that, whereas iodine was invariably set free from both sodium periodate and sodium iodate if the concentration of the reductone were greater than 10 3M, no iodine was liberated at lower concentrations (e.g. 6 x 10 4M) of substrate, even in the presence of relatively large amounts of the oxidants. 

Self-Test K.3B When sulfuric acid reacts with sodium iodide, sodium iodate and sulfur dioxide are produced. Identify the oxidizing and reducing agents in this reaction. 

The potential for violence of interaction between the powerful reducing agent potassium and oxidant classes has been well described. Other miscellaneous oxygen-containing substances which react violently or explosively include sodium iodate, silver iodate, lead sulfate and boric acid. 

As depicted in the following scheme, in the presence of sodium iodate and pyridine, several 5,6-dihydroxylated benzofuran derivatives were synthesized via an oxidation-Michael addition of P-dicarbonyl compounds to catechols in a one-pot procedure <06TL2615 06JHC1673>. A novel additive Pummerer reaction of 2-benzo[fc]furan sulfilimines with carbon nucleophiles derived from P-dicarbonyl compounds was also employed to the synthesis of 2,3-disubstituted benzo[b]furans <06TL595>. 

Palladium(II) oxide, 4825 Palladium(IV) oxide, 4835 Perchloric acid, 3998 Periodic acid, 4425 Permanganic acid, 4434 Peroxodisulfuric acid, 4482 Peroxodisulfuryl difluoride, 4328 Peroxomonosulfuric acid, 4481 Peroxytrifluoroacetic acid, 0666 Platinum hexafluoride, 4371 Platinum(IV) oxide, 4836 Plutonium hexafluoride, 4372 Potassium bromate, 0255 Potassium chlorate, 4017 Potassium dichromate, 4248 Potassium iodate, 4619 Potassium nitrate, 4650 Potassium nitrite, 4649 Potassium perchlorate, 4018 Potassium periodate, 4620 Potassium permanganate, 4647 Rhenium hexafluoride, 4373 Rubidium fluoroxysulfate, 4309 Ruthenium(VIII) oxide, 4862 Selenium dioxide, 4838 Selenium dioxide, 4838 Silver permanganate, 0021 Sodium chlorate, 4039 Sodium chlorite, 4038 Sodium dichromate, 4250 Sodium iodate, 4624 Sodium nitrate, 4721 Sodium nitrite, 4720... 

Oxidation of an Fe" salt solution with air, urotropin, sodium iodate or sodium nitrate or with air in the presence of a complexing agent such as pyridine or sodium thiosulphate (Robl, 1958). 

The periodate olefin cleavage generated large amounts of colloidal MnO2 waste and sodium iodate (NalOj). The process therefore involved multiple unit operations and suffered from poor volume productivity and oxidation efficiency (three out of four available oxygens in NalO4 are wasted). 

Gilliam, Spectral Characteristics of Flares Containing Sodium Iodate as Oxidizer , NAD-RDTR-276 (1974) (AD 782510) 40) A J. 

See Carbon dioxide, above Ammonium nitrate Metals Barium peroxide Metals Dinitrogen tetraoxide Metals Hydrogen peroxide Metals Lead(IV)oxide Metals Nitric acid Metals Oxygen (Liquid) Metals Potassium chlorate Metals Potassium perchlorate Powdered metals Sodium iodate Metals Sodium nitrate Magnesium See Halogens etc., above See Metal oxides, above See Metal oxosalts, above See Sulfur, etc., below... 

Crystalline paraperiodic acid, H5I06, which is hygroscopic and readily soluble in water, is commercially available. Most of the salts of periodic acid are characterized by their slight solubility in water. For oxidation experiments sodium metaperiodate, NaIC>4, is the most suitable salt because of its solubility in water (9.3% at 20° and 12.6% at 25°).99 Sodium metaperiodate is commercially available and also can be obtained readily from the slightly soluble trisodium paraperiodate, Na3H2I06, by crystallization from nitric acid in the ratio of 150 cc. of water and 45 cc. of concentrated nitric add to 100 g. of salt.9 Trisodium paraperiodate is formed in 90% yield by the reaction of bromine and sodium iodide in aqueous sodium hydroxide solution at 80°.100 It is also produced in 80% yield by the oxidation of sodium iodate with chlorine in aqueous sodium hydroxide solution.99 In connection with this preparation of trisodium paraperiodate from sodium iodate, it should be noted that in the usual periodate oxidation reactions the periodate is converted quantitatively into iodate. Paraperiodic acid has been prepared in about 93% yield from trisodium paraperiodate " 1 it has been prepared also by the electrolytic oxidation 191 >192 of iodic add. 

Sodium iodate, NaI03.—The iodate is a constituent of Chile saltpetre or sodium nitrate, and remains in the mother-liquor after crystallization of the nitrate. It is an important source of iodine. The salt can be prepared by oxidizing sodium iodide with sodium peroxide6 or by the electrolytic method,7 and also by the interaction of sodium iodide and periodate.8 It forms white crystals. 

Disodium periodate, Na2HgI06, can be prepared by the action of chlorine on a mixture of sodium iodate and hydroxide,16 or by the oxidation of iodine with sodium peroxide.17 It is soluble with difficulty in both cold and hot water. The table gives determinations of solubility made by Rosenheim and Loewenthal 18... 

Procedure of Kline and Acree. For the determination of the aldose present it is preferable to take an aliquot of the sugar solution, or a weighed amount of the solid substance, which will react with approximately 20 ml. of 0.1 A iodine. Titrate this solution with 0.1 A sodium hydroxide or hydrochloric acid until it is exactly neutral to phenolphthalein. Add the phenolphthalein at this point only when it is necessary to bring the solution to neutrality and use only one drop, as the alcohol introduces a potential source of error involving a loss of iodine. A water solution of this indicator or of phenol red or thymol blue might be used for this titration. Add 5 ml. of 0.1 A iodine from a buret then add drop by drop from a buret 7.5 ml. of 0.1 A sodium hydroxide. Repeat this process until 22 ml. of iodine and 35 ml. of alkali have been added. This operation takes about five to six minutes. Allow a two-minute interval for the completion of the oxidation. Acidify with 0.1 A (or 0.2 A) hydrochloric acid to free the iodine from any sodium iodate present and titrate the liberated iodine with... 

Sodium iodate, NalOj, is used rarely its applications are limited to the oxidation of aromatic polyhydroxy compounds to quinones [753, 754]. 

Silver oxide and sodium sulfate are frequently used to oxidize 1,2-dihydroxy aromatic compounds to orf/io-quinones. Phenanthrene furnishes, after being shaken for 15 s with the mixture in ether at room temperature, a 65% yield of 3,4-phenanthrenequinone [171]. Another oxidant used to prepare orfho-quinones is sodium iodate (equation 321) [754],... 

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