Hetero-metal Mn–Cu and Mn–Ni clusters with tridentate Schiff-base ligands

Novel hetero-metal di-, tetra-, and octanuclear Mn–Cu clusters of [MnIIICuII(5-Br-sap)2Cl(EtOH)] (1), [MnIIICuII(5-Cl-sap)2Cl(MeOH)] (2), [Mn2IIICu2II(5-Br-sap)4(H2O)2](ClO4)2 (3(ClO4)2), [MnIIICu3II(5-Br-sae)4(H2O)2](PF6)·2Et2O (4(PF6) · 2Et2O), [Mn2IIIMn2IICu4II(3-OMe-sap)4(μ4-O)2(μ2-OMe)2Cl2]Cl2·2MeOH (5Cl2 · 2MeOH), as well as tetranuclear Mn–Ni clusters of [Mn2IIINi2II(sap)2(sal)2(μ3-OMe)2(OAc)2] (6),[Mn2IIINi2II(sap)2(sal)2(μ3-OMe)2(NO3)2(MeOH)2] (7) were prepared by simple one-pot reactions of multidentate Schiff base ligands with metal sources. All clusters were selectively obtained by changing reaction conditions, employment of suitable co-ligands, and slightly modified ligands. We report here syntheses, structure and magnetic properties of a series of hetero-metal Mn–Cu and Mn–Ni clusters.

Novel Mn–Cu and Mn–Ni multi-nuclear hetero-metal clusters were synthesized by simple one-pot reactions of multidentate Schiff base ligands with metal sources.All clusters were selectively obtained by changing reaction conditions, suitable co-ligands, and slight modification of ligand structures.The structures and magnetic properties of these hetero-metal clusters were presented.Figure optionsDownload as PowerPoint slide