Synthesis, Structures and Magnetic Properties of two Heteroleptic Dy3+ Borohydride Complexes

We report the synthesis, structures and magnetic properties of two Dy3+ heteroleptic complexes [Dy(BH4)2(THF)5][BPh4] (1) and [Dy(BH4)2(tBu4Carb)(THF)] (2) (tBu4Carb=1,3,6,8‐tetra‐tert‐butyl‐9H‐carbazole). Both complexes show a κ3‐coordination mode of the borohydride anion but distinct geometries. Whereas the cationic complex 1 does not exhibit a slow relaxation of the magnetization, the neutral complex 2 behaves as a field‐induced single‐molecule magnet. The synthesis, structures and magnetic properties of two Dy3+ heteroleptic complexes [Dy(BH4)2(THF)5][BPh4] (1) and [Dy(BH4)2(tBu4Carb)(THF)] (2) (tBu4Carb=1,3,6,8‐tetra‐tert‐butyl‐9H‐carbazole) are reported. These complexes exhibit a κ3 coordination mode of the borohydride anion. Whereas the cationic complex 1 does not exhibit a slow relaxation of the magnetization, the neutral complex 2 behaves as a field‐induced single‐molecule magnet.