Transition-metal periodato complexes. Their preparations and properties as catalytic oxidants, and X-ray crystal structure of Na4K[Au{IO5(OH)}2]·KOH·15H2O

Abstract

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 [M₆O₂₄I]^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 co-ordination 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.