Iodine iodates

An earlier report51 that phenanthridone is brominated at C-2 on treatment with bromine in acetic acid has been confirmed291 chlorination (molecular chlorine) and iodination (iodine-iodate) in acetic acid give the corresponding 2-halogeno compounds in excellent yield.291 The bromination of 2-acetamidophenanthridone has also been described, although the orientation was not established with certainty.291... 

H. Kappeler made a similar sulpliate by reducing solid iddic acid with dry sulphur dioxide. Aq. potassium hydroxide reacts with iodine dioxide to form potassium iodate and iodide 6I02+6K0H—5KI03+KI+3H20. The oxide I4O9 is thought to be iodine iodate, with tervalent iodine, namely, 1(103)3, reacts with water,... 

Iodine (I, at. mass 126.90) is a solid non-metal, which is fairly volatile at room temperature and sublimes easily. Iodine dissolves readily in aqueous KI solutions to yield the I,f complex, and is also soluble in organic solvents (CHCI3, CCI4, C6H6). It occurs mainly in the -I, V, and VII oxidation states. Iodide reveals reducing properties, whereas iodine, iodate, and periodate have oxidizing properties. Iodide, like chloride and bromide, forms sparingly soluble compounds and soluble complexes with some metals... 

As another example of catalytic decomposition of hydrogen peroxide by compensating reactions, Bray and his school have studied the system iodine iodate-hydrogen peroxide. In solutions of moderate acidity ( 0.1 N) iodate ion decomposes hydrogen peroxide and is itself unaffected at the end. Bray and Caulkins (30) observed that during the... 

The carrier is pipetted into the sample solution at the beginning of the analytical process and mixed thoroughly with the solution. The chemical state of the carrier must be identical to that of the radionuclide. If any difference is possible, steps must be inserted into the procedure at this point to achieve identical form for carrier and tracer. A common process is to oxidize and reduce the carrier and radionuclide through all possible oxidation states. For example, if the radionuclide is not known to be in the form of iodide and the carrier is added as iodide, the mixture is oxidized through molecular iodine, iodate, and periodiate, and then reduced back to iodide. 

The exchange between molecular halogen or hahdes and halates or perhalates is slow. The iodine-iodate-exchange reaction was investigated in detail by Myers and Kennedy (1950). The reaction is complex and a possible mechanism was proposed, which involves two-electron transfer from a chemical species containing I to one containing 102 as a rate determining step. 

Methods that have been used for determining the iodine/iodate ratio in fuel solutions are (a) analysis of samples taken from an autoclave at 2oO°C at measured intervals after injection of iodine in various states [11], (b) analysis of samples taken from the liquid in liquid-vapor equilibrium studies at 260 to 330°C [11], (c) rapid sampling from static bombs at 250 to 300°C [12], and (d) continuous injection of iodate-containing fuel solution into the above described ejector loop at 220°C and determining... 

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