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Abstract
Reactions of manganese nitrate and lanthanide nitrate hexahydrate with 2-(hydroxymethyl)pyridine (hmpH) and trimethylacetic acid as co-ligands in the mixture solutions of acetonitrile and ethanol generated two hexanuclear Mn-Ln compounds [Mn4La2O2(hmp)7(tBuCO2)2.5(NO3)4.5] [Ln=La (1), Nd (2)]. Compounds 1 and 2 are isostructural and possess a core of [MnIII4LaIII2(μ4-O)(μ3-O)(μ3-OR)(μ2-O)7]2−, which comprises three face-sharing defected cubane units. The species are new additions to the Mn/Ln clusters and the broader class of 3d/4f molecular systems. The solid-state direct current magnetic susceptibility analyses indicate the antiferromagnetic interactions within two compounds. The systematic investigation summarized that the variation of auxiliary ligand carboxylate R group affects structural distortions and switch the magnetic behaviour.
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