Reversible Size Modification of Iron and Gallium Molecular Wheels: A Ga10 Gallic Wheel and Large Ga_18 and Fe_18 Wheels

摘要

Complexes of high nuclearity, symmetry, and architectural beauty have long fascinated chemists, owing both to their aesthetically pleasing nature and to their often interesting properties. A particularly intriguing type within this class is the single-strand molecular wheel, whose prototype [{Fe(OMe)_2(O_2CCH_2Cl)}_10] was dubbed the ferric wheel[1] and was also later reported with other carboxylates.[2] Many other Fex wheels have since been reported and now comprise the largest family of known molecular wheels.[3] There are, however, other examples composed of Co,[4] Cr,[2c], [5] Cu,[6] Dy,[7] Mo,[8] Mn,[9] Ni[10] and V metal centers.