Structures and Magnetic Properties of Two Analogous Dy6 Wheels with Electron-Donation and -Withdrawal Effects

Two new hexanuclear symmetric dysprosium wheels, namely, [Dy-6(L-1)(6)(L')(6)(OCH3)(6)(2CH(3)OH)] and [Dy-6(L-2)(6)(L')(6)(OCH3)(6)(2CH(3)OH)] (L1H = pivalic acid and L2H = 3,5-dinitrobenzoic acid, L'H = 2,6-dimethoxyphenol) were isolated employing a mixed-ligand strategy. The strategic introduction of two different auxiliary groups with diverse steric effects and electrostatic actions affect the magnetic coupling and local anisotropy of Dy-III ion, therefore exhibiting dissimilar magnetic behaviors.