New heterometallic [Mn(4)(III)Ln(4)(III)] wheels incorporating formate ligands

Two heteroctanuclear wheel complexes with an eight-membered saddle-like ring of [Mn(4)(III)Ln(4)(III)] (Ln = Dy, Gd), prepared by employing formates as key carboxylate bridges, exhibit antiferromagnetic interactions between Mn-III and Ln(III) centers, and the wheel containing anisotropic Dy-III ions shows SMM behaviour.