Abstract
We report the synthesis, structure and magnetic properties' investigations of a series of new dysprosium heteroleptic mono-and dinuclear complexes based on the association of chloride and different diazabutadiene (DAD 2R = [2,6-iPr2C6H3N-CRCR-NC6H3iPr2-2,6]; R = H, Me) ligands showing different redox states. While using dianionic DAD 2R ligands affords the formation of dichloro-bridged dinuclear complexes [Dy2(DAD 2R)(-Cl)2(THF)2] (R = H (1), Me (2)), two different mononuclear complexes of general formula [DyCl2(DAD 2R)(THF)2] (R = H (3), Me (4)) could be obtained with either a radical monoanionic and a monoanionic DAD 2R state, respectively. Remarkably, all the complexes exhibit a slow relaxation of their magnetization where the relaxation dynamics depends on both, the nuclearity of the system and the DAD 2R redox state.