A 1D copper(II) chain featuring novel hexanuclear secondary building blocks: Synthesis, crystal structure and magnetic property

A 1D copper(II) chain with novel hexanuclear copper(II) units [Cu6(L)2(py)4] (H6L = N,N′-(2,6-pyridine-dicarboxyl)-disalicylhydrazide, py = pyridine) as secondary building blocks, was synthesized and characterized by single crystal X-ray diffraction, elemental analysis, IR and thermogravimetric analysis. The hexanuclear unit is formed by the assembly of two tetranuclear subunits via two public copper ions coordinating simultaneously to two L6− ligands, and the 1D chain structure of the compound is constructed by the connection of the hexanuclear units via the bridging of the phenolic oxygen atoms of the L6− ligands. The magnetic study of the compound indicates an antiferromagnetic coupling interaction between Cu(II) ions.

The title one-dimensional copper(II) chain features novel hexanuclear secondary building blocks [Cu6(L)2(py)4] (H6L = N,N′-(2,6-pyridine-dicarboxyl)-disalicylhydrazide) and displays an antiferromagnetic coupling interaction between Cu(II) ions.Figure optionsDownload as PowerPoint slideResearch highlights
► A 1D chain featuring hexanuclear units was obtained from a multi-salicylhydrazide ligand.
► H6L is the first ligand with multi-carboxyl and multi-salicylhydrazide groups.
► It is the highest-nuclear unit of polymer connected by N-acyl-salicylhydrazide itself.
► The title compound presents an antiferromagnetic coupling interaction.