“Squaring the Circle”: Molecular Squares and Rectangles from Chelate-Induced Structural Transformations of Known Fe10 and New Fe12 Ferric Wheels

Abstract

A diolate-bridged Fe12 member of the “ferric wheel” class of molecular wheels has been obtained to complement the known MeO--bridged members such as the prototypical Fe10 wheel; reaction of these Fe10 and Fe12 ferric wheels with N-based chelates has given Fe4 and Fe12 molecular rectangles and squares, respectively.