Chelation Behaviour of New Tetradentate Schiff Base Type N2O2 Derived from Benzil and O-aminophenol Towards VO(II), Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Pd(II) and Cd(II) Ions

Benzil was reacted with 2-amino phenol in methanol as a solvent in presence of drops of glacial acetic acid as a catalyst, to give a new Schiff base as tetradentate ligand [H2L], (C26H20N2O2) containing N and O donar atoms type (N2O2) : 2-({(1E)-2-[2-hydroxyphenyl)imino]-1,2-diphenylethylidene}amino)phenol. This ligand [H2L] was reacted with some metal ions in methanol to give a series of new metal complexes of two general formula : [ML] and [M-L].H2O. (where M= VO(II), Co(II), Ni(II), Cu(II), Pd(II) and Cd(II); M- = Mn(II) and Zn(II), L= C26H18N2O2). All compounds were characterized by spectroscopic methods (IR, U.V-Vis, atomic absorption), microanalysis of the elements C.H.N, magnetic susceptibility along with conductivity measurements . From the above data the suggested geometrical structure from Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes is tetrahedral geometry, while Pd(II) and VO(II) form square planer and square pyramidal geometries respectively.