Mononuclear Dysprosium Thiocyanate Complexes with 2,2′‐Bipyridine and 1,10‐Phenanthroline: Synthesis, Crystal Structures, SIM Behavior, and Solid‐Phase Transformations

Five new dysprosium complexes were synthesized and characterized: neutral Dy(NCS)3·6(H2O) (1), [Dy(NCS)3(H2O)(bpy)2]·0.5(bpy)·H2O (2), and [Dy(NCS)3(H2O)(phen)2]·phen·0.5H2O (3), as well as ionic [Hbpy][Dy(NCS)4(bpy)2]·H2O (4) and [Hphen][Dy(NCS)4(phen)2] (5). In all complexes, the metal coordination number (CN) is 8. All complexes exhibit single‐ion magnet behavior. The influence of the structural features on ΔE/kB values is discussed. The thermal behavior of the new compounds was studied under an inert atmosphere in the temperature range of 30–550 °C. The thermal stability of the complexes is determined by the presence of solvate molecules. New molecular and anionic mononuclear complexes of Dy(NCS)3 with H2O/bpy/phen were synthesized and characterized. All compounds exhibit single‐ion magnet (SIM) behavior. The thermal stability of the complexes is determined by the presence of solvate molecules.