Synthesis, Structures, and Single-Molecule Magnetic Properties of Three Dy Complexes.

To explore the influences of the subtle structural variations in the ligand backbones on the single-molecule magnetic properties of dinuclear dysprosium(III) complexes, three ligands-H L (H L =N ,N -bis(salicylaldehyde)diethylenetriamine), H L (H L =N ,N -bis(3-methoxysalicylidene)diethylenetriamine), and H L (H L =N ,N -bis(5-chlorosalicyladehyde)diethylenetriamine)-were synthesized and employed to prepare the expected dinuclear dysprosium(III) complexes. The three ligands differ in terms of the substituents at the benzene rings of the salicylaldehyde moieties. The reactions of Dy(NO ) ⋅6 H O, pivalic acid, and the ligands H L , H L , and H L generated complexes with the formulae [Dy (L ) (piv) ] (1), [Dy (L ) (piv) ] (2), and [Dy (L ) (piv) ]⋅ 2 MeCN (3), respectively.