2-Pyrrolyloximes in high-nuclearity transition-metal cluster chemistry: Fe10 and Fe12.

The employment of 2-pyrrolyloximes in high-nuclearity transition-metal cluster chemistry has provided access to unprecedented decanuclear and dodecanuclear FeIII cagelike clusters bearing the anion of pyrrole-2-carboxaldehyde oxime (praoH2), the simplest member of this new family of ligands; the identity of the products depends on the nature of the counteranion present in the starting materials.