Iodine VII Compounds

Periodic acid and periodates are the most important, commercially available compounds of iodine(VII). Periodates were first prepared in 1833 by oxidation of NalOs with chlorine in alkaline solutions [727]. The industrial preparation of periodates is based on electrolytic oxidation of iodates. Aqueous solutions of periodic acid are best obtained by treating barium paraperiodate with concentrated nitric acid. In solution it exists as a fairly weak orthoperiodic acid, HsIOe, which can be dehydrated to HIO4 by heating to 100 °C in vacuum [643]. Structural investigations indicate an octahedral configuration about iodine in most periodates [643,728]. 

Periodic acid and periodates have found wide application in organic chemistry as powerfiil oxidizing reagents [729-731]. The well-known periodate glycol oxidation involves the cyclic periodate esters as key intermediates however, none of the organic periodate esters have been isolated as stable compounds. 

and Seppelt, K. (2000) Angewandte Chemie, Intemational Edition, 39, 1448. 

(2001) Zeitschrift fur Natuiforschung Section A-A Jourtud of Physical Sciences, 56, 333. 

EUestad, O.H., Woldbaek, T., Kjekshus, A., et al. (1981) Acta Chemica Scandinavica - Series A Physical Inorganic Chemistry, A35, 155. 

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The possible use of KrF2 or KrF+ salts as oxidizing agents to produce iodine(vii) compounds has been reported the conversion of IF5 into IFj was effected by KrF+ SbgF" and I2 to IF7 by the neutral krypton fluoride. ... 

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