Synthesis and Spectral Characterization of Mono- and Homodinuclear Complexes of Co(II), Ni(II), and Cu(II) with a Compartmental Hexadentate Schiff Base Ligand Derived from 3-Formylsalicylic Acid

Reaction between 3-formylsalicylic acid and 4,5-dichloro-1,2-phenylenediamine gave a compartmental hexadentate Schiff base (H4fsacph) with an N2O4 donor frame involving an inner N2O2 set of donors and an outer set of O2O2 donors. Three mononuclear complexes of the form M(H2fsacph)(H2O)2 (M = Co(II), Ni(II), Cu(II), and three homodinuclear complexes M'2(fsacph)(H2O)2 (M' = Co(II), Ni(II)) and Cu2(fsacph) were isolated and analyzed by physico-chemical techniques. The metal ions have been found to occupy the outer coordination site in the mononuclear complexes and occupy both sites in the dinuclear complexes.

ESAM ABD El-MALEK ABD-ALLAH ORABI ,