Fig. 1: The synthetic strategy towards ErRe3 and its structure.
From: An intermetallic molecular nanomagnet with the lanthanide coordinated only by transition metals
Graphical representation of the structural design transfer from the intermetallic magnet SmCo5 (A, B) to the molecular nanomagnet [ErIII(ReICp2)3] (C). The hexagonal planar SmCo6 coordination with unsupported coordination bonds between the center of the rare earth and six transition metals in SmCo5 (A, B) is mimicked by the trigonal planar coordination in ErRe3 (C). All three panels A–C are based on single-crystal structural models of SmCo51 and ErRe3. Sm-Co bonds in SmCo5: 2.888 Å; Er-Re bonds in ErRe3: 2.9004(5), 2.9124(5), 2.9172(5) Å. Panel D presents the synthesis of ErRe3 based on the work of Kempe et al.32. This approach utilizes the reaction of the weak Brønsted acid [Cp2ReH] with the strong Brønsted base btmsm− in [ErIII(btmsm)3] in benzene at room temperature (RT) resulting in (Me3Si)2CH2 elimination and the formation of [ErIII(ReICp2)3].
