Formation of binuclear metal complexes with multidentate schiff-base oxime ligand : synthesis and spectral investigation

Abstract EN

The new polydentate Schiff-base oxide (1E,1`E)-2hydroxy-3-((E)-(2-((E)-2-hydrxy3-((E)-(hydroxyimino)methyl)-5-methylbenzyldeneamino)ethylimino)methyl) 5methylbenzaldehyde oxide H4L and its binuclear metal complexes with Mn (II), Fe (II), Co (II) and Cu(II) are reported.

The reaction of 2,6 diformyl–4–methyl phenol with hydroxyl amine hydrochloride in mole ratios of 1:1 gave the precursor (E)-2-hydroxy-3-((hydroxyimino)methyl)-5-methylbenzaldehyde.

Condensation reaction of precursor with ethylenediamine in mole ratios of 2:1 gave the new N4O2 Schiff-base oxide ligand H4L.

Upon complex formation, the ligand behaves as a triadic hexadantate species.

The mode of bonding and overall geometry of the complexes were determined through physico-chemical and spectroscopic methods.

These studies revealed tetrahedral geometries for Mn (II), Fe (II), Co (II) complexes and square planar geometry about Cu(II) complex of general formulae [M2(HL)](Cl) (H2O).

Molecular structure of the for Mn (II), Fe (II), Co (II) complexes has been optimized by CS Chem.

3D Ultra Molecular Modeling and Analysis Program and supported tetrahedral geometry.