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<p>A methanol solvate of the tetranuclear Cu(II) complex with 4-methoxypyridine (4-MOP) as co-ligand have been synthesized, [Cu<sub>4</sub>OCl<sub>6</sub>.(4-MOP)<sub>4</sub>].CH<sub>2</sub>OH, (4-MOP = 4-methoxypyridine) and characterized by IR, UV–Vis spectroscopy and single crystal X-ray diffraction. The complex exhibits a tetrahedral {Cu<sub>4</sub>O} core, where four Cu(II) ions are bridged by six chloride ligands and further stabilized through coordination with 4-methoxypyridine ligands. Each copper center displays a distorted trigonal bipyramidal geometry. Intermolecular C–H···Cl and C–H···O hydrogen bonds interconnect the molecules, forming a three-dimensional supramolecular framework. Spectroscopic data, including UV-Vis and FT-IR, substantiate the formation of the Cu<sub>4</sub>O cluster and align with the structural observations. These findings offer valuable insights into the coordination behavior and supramolecular organization of µ<sub>4</sub>-oxo copper complexes, presenting a useful model for biomimetic systems and a potential foundation for applications in catalysis and material science.</p> Graphical Abstract <p>A rare example of a µ<sub>4</sub>-oxo-bridged tetranuclear Cu(II) complex stabilized by 4-methoxypyridine ligands has been selectively synthesized and structurally characterized. This is among the few known Cu₄OCl₆ type architectures incorporating 4-MOP, revealing a well-defined {Cu<sub>4</sub>O} core and a 3D supramolecular network through weak hydrogen bonding.</p> <p></p>

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Synthesis, Crystal Structure, FT-IR and UV-Vis Spectra of Tetranuclear Copper (II) Complex with 4-methoxypyridine as Co-Ligand

  • 期刊论文

  • 发表日期：

    2025年8月21日

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  • Ugur Erkarslan,
  • Gorkem Oylumluoglu,
  • Ozay Eroglu,
  • Hanife Sevval Dere,
  • Elif Gungor,
  • Hulya Kara Subasat,
  • Adem Donmez

摘要

A methanol solvate of the tetranuclear Cu(II) complex with 4-methoxypyridine (4-MOP) as co-ligand have been synthesized, [Cu4OCl6.(4-MOP)4].CH2OH, (4-MOP = 4-methoxypyridine) and characterized by IR, UV–Vis spectroscopy and single crystal X-ray diffraction. The complex exhibits a tetrahedral {Cu4O} core, where four Cu(II) ions are bridged by six chloride ligands and further stabilized through coordination with 4-methoxypyridine ligands. Each copper center displays a distorted trigonal bipyramidal geometry. Intermolecular C–H···Cl and C–H···O hydrogen bonds interconnect the molecules, forming a three-dimensional supramolecular framework. Spectroscopic data, including UV-Vis and FT-IR, substantiate the formation of the Cu4O cluster and align with the structural observations. These findings offer valuable insights into the coordination behavior and supramolecular organization of µ4-oxo copper complexes, presenting a useful model for biomimetic systems and a potential foundation for applications in catalysis and material science.

Graphical Abstract

A rare example of a µ4-oxo-bridged tetranuclear Cu(II) complex stabilized by 4-methoxypyridine ligands has been selectively synthesized and structurally characterized. This is among the few known Cu₄OCl₆ type architectures incorporating 4-MOP, revealing a well-defined {Cu4O} core and a 3D supramolecular network through weak hydrogen bonding.