Trinuclear Copper(II) Endomacrocyclic Complex with a New Nonaazamacrocyclic Ligand Showing a Trapped Perchlorate Anion

The first structurally characterized example of an aza Schiff base tricopper(II) endomacrocyclic complex has been obtained. The complex presents a calixarene type conformation with a large central hole occupied by a perchlorate ion. It remains occluded in the cavity as it is trapped by acetonitrile and water molecules coordinated to the metal ions.