Hetero-metal Mn–Cu and Mn–Ni clusters with tridentate Schiff-base ligands
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Novel hetero-metal di-, tetra-, and ocutanuclear Mn-Cu clusters of [MnIIICuII(5-Br-sap)2Cl(EtOH)] (1), [MnIIICuII(5-Cl-sap)2Cl(MeOH)] (2), [MnIII2CuII2(5-Br-sap)4(H2O)2](ClO4)2 (3(ClO4)2), [MnIIICuII3(5-Br-sae)4 (H2O)2](PF6)·2Et2O (4(PF6)·2Et2O), [MnIII2MnII2CuII4(3-OMe-sap)4(μ4-O)2 (μ2-OMe)2Cl2]Cl2·2MeOH (5Cl2·2MeOH), as well as tetranuclear Mn-Ni clusters of [MnIII2NiII2(sap)2(sal)2(μ3-OMe)2(OAc)2] (6), [MnIII2NiII2(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.
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