Syntheses, structures and magnetic properties of two 2D lanthanide-copper complexes with an unprecedented μ7-EDTA coordination mode

Two novel lanthanide–copper complexes with an unprecedented μ7-edta coordination mode have been synthesized and characterized by single-crystal X-ray diffraction studies. Its framework can be described as one 2D net with Cu(edta)(H2O) as the edges and Cu2(H2O)2 as the nodes and the lanthanide atom is captured in the center.

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► Two novel lanthanide-copper complexes with EDTA ligand have been synthesized.
► Its 2D net can describe the edges of Cu(edta)(H2O) and the nodes of Cu2(H2O)2.
► One lanthanide ion is captured in each mesh.
► The edta4 − ligand acts as a hendecadentate bridging ligand.