Synthesis, crystal structure, FT-IR and UV-Vis spectra of tetranuclear copper (II) complex with 4-methoxypyridine as co-ligand

Abstract

A methanol solvate of the tetranuclear Cu(II) complex with 4-methoxypyridine (4-MOP) as co-ligand have been synthe sized, [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.