Structure and Properties\nof New Mixed-Valent [Mn^III₂Mn^IV₃Ln^III₅O₅] Complexes (Ln^III = Tm^III, Lu^III, and Yb^III)

Abstract

By using 2′-hydroxyacetophenoxime, a new family\nof complexes\nwith an [Mn^III₂Mn^IV₃Ln₅O₅] core was obtained with Ln\n= Tm (<b>1</b>), Lu (<b>2</b>), and Yb (<b>3</b>). Heterometallic Mn/Tm and Mn/Lu combinations have had no precedence\nso far. Studies of the magnetic properties indicate the presence of\nintracomplex antiferromagnetic interactions in <b>1</b> and <b>3</b>, as well as a dominating ferromagnetic interaction between\nMn^III and Mn^IV spins in <b>2</b>, leading\nto an <i>S</i>_T = ⁵/₂ ground\nstate.