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The hydrothermal reaction of a 2 3 9 Pu(IV) stock solution in the presence of iodic acid and 1 M KOH produces reddish-brown single crystals of (PuO 2 ) 2 (IO 3 )(OH) 3 . The structure consists of two-dimensional layers forming in the ac plane and is the first single-crystal structure of plutonium(VI) connected through hydroxide anions. The additional linkage of plutonium centers is completed through iodate ligands.

Benzene, halobenzenes, and a number of more or less deactivated arenes, including nitrobenzene , readily reacted in anhydrous HIO 3 /AcOH/Ac 2 O/conc. H 2 SO 4 mixtures to probably give ArIO 2 intermediates or other hypervalent species ( not isolated ). The final reaction mixtures were poured into excess aq. Na 2 SO 3 solution ( a reductant ) to give the purified iodinated products in 39-83% yields. Keywords : Arenes, iodoarenes, aromatic iodination, iodic acid as reactant and iodinating agent Introduction In 1892 Meyer and Wachter [1], in describing iodosylbenzoic acid, the first iodosylarene, included there the following passage: “Ferner ist zu prufen, ob man durch Behandlung von aromatischen Substanzen mir Schwefelsaure und Jodsaure, - JO 2 OH, entsprechend der Reaction der Salpetersaure, NO 2 OH, - Verbindungen mit der Gruppe -JO 2 erhalten kann. Wir konnen vorlaufig nur mittheilen, dass Benzol beim Zusammenbringen mit Jodsaure und Schwefelsaure ausserst heftig reagirt und auf Zusatz von Wasser einen festen Korper abscheidet, welchen wir not naher untersuchen werden“. It

Selective electrophilic iodination of 2-acetyl-1-naphthol was achieved using iodine and iodic acid in combination with grinding at room temperature under solvent-free conditions to yield 1-(1-hydroxy-4-iodo-naphthalen-2-yl)-ethanone. Grinding mode of reactions has not only of interest from economical point of view, in many cases they also offer considerable advantages in terms of yield, mild reaction conditions, selectivity and simplicity of reaction procedure.