Pentagonal-Bipyramid Ln(III) Complexes Exhibiting Single-Ion-Magnet Behavior: A Rational Synthetic Approach for a Rigid Equatorial Plane.

A pentadentate chelating ligand is employed for the facile synthesis of air-stable pentagonal-bipyramid Ln(III) complexes with a rigid equatorial plane. The Dy(III) analogue exhibits single-ion-magnet behavior with Ueff/ kB = 70 K under Hdc = 500 Oe.