TRANSITION-METAL PERIODATO COMPLEXES - THEIR PREPARATIONS AND PROPERTIES AS CATALYTIC OXIDANTS, AND X-RAY CRYSTAL-STRUCTURE OF NA4K[AU(IO5(OH))2].KOH.15H2O

The preparations and properties as oxidants for alcohols, aldehydes and activated primary alkyl halides of [M{IO5(OH)}2]5- (M = Cu, Ag or Au), [M(OH)2{IO5(OH)}2]6- (M = Ni, Pd or Pt), trans-[MO2{IO5(OH)]2]6- (M = Ru or Os) and [M5O24I]5- (M = Mo or W) are reported. The X-ray crystal structure of Na4K[Au{IO5(OH)}2].KOH-15H2O shows the gold atom to be square planar with coordination by two bidentate [IO5(OH)]4- ligands; the [Au{IO5(OH)}2]5- units are linked by NaO6 octahedra to form polymeric chains which are cross-linked by potassium ions.