Controlling assembly and single-molecule magnet behavior of Fe-Ni clusters utilizing steric effect

A trinuclear cyanide-bridged FeIII2NiII cluster [NiⅡ(Clbpy)2][(pzTp)FeⅢ(CN)3]2▪4H2O(1) and a tetranuclear cyanide-bridged FeIII2NiII2 cluster {[NiⅡ(Clbpy)2][(Tp*)FeⅢ(CN)3]}▪4CH3OH▪2H2O (2) were synthesized. Magnetic measurements indicated that both compound 1 and 2 exhibited ferromagnetic interaction, but compound 2 behaves as the single-molecule magnet.247