Structural, spectroscopic characterization and EPR spectra of nitrato-μ-[N,N′-ethylenebis(3-methoxysalicylideneimine) Cu(II)Ag(I)] complex

A novel heterodinuclear complex formed by the reaction of silver nitrate with Schiff base complex of copper(II) has been synthesized and characterized by Infrared (IR), ultraviolet–visible (UV–VIS), electron paramagnetic resonance (EPR) and X-ray diffraction methods. Preparation and crystal structure of the heterodinuclear complex, LCuAgNO3, (L = N,N′-ethylenebis(3-methoxysalicylideneimine) are reported. The crystal structure consists of ordered dinuclear units with CuII and AgI ions are bridged by two oxygen atoms of Schiff base ligand. The copper(II) ion has a distorted square-planar geometry involving the N2O2 donor set of Schiff base ligand. The g-values were calculated for title complex both in polycrystalline state at 298 K and in frozen DMF (113 K). The evaluated metal–ligand bonding parameters showed strong in-plane σ bonding.

Three dimensional structure of the title complex. Dashed lines indicate the hydrogen bonding interactions.Figure optionsDownload as PowerPoint slideResearch highlights
► Structural and magnetic properties of the title complex are characterized by IR, UV, EPR and X-ray diffraction technique.
► The copper(II) environment is best described as a slightly distorted square planar.
► EPR results show that the paramagnetic center of the Cu2+ ion is axial symmetry.