A cyanide and hydroxo-bridged nanocage: a new generation of coordination clusters.

Combining serendipitously-formed hydroxo-clusters, [Co(II)(3)(OH)(piv)(4)(L)](+) (where L = MeCN or Hpiv), with assembling cyanide building block, [Fe(III)(Tp)(CN)(3)](-), has led to an unprecedented architecture where polymetallic cobalt clusters and blocked tris-cyanide iron complexes define the apexes of a unique magnetic cubic nanocage.