Synthesis and characterization of some mononuclear complexes of the Schiff base {N,N′-2,20′-bis(aminoethyl)methylaminebis-(3-carboxysalicylaldimine)}

Reaction of 3-formylsalicylic acid with diethylenetriamine yielded the Schiff base {N,N'-2,2'-bis(aminoethyl)methylaminebis(3-carboxysalicylaldimine)}, abbreviated as H(4)fsadien. The interaction of H(4)fsadien with CoCl(2)center dot 6H(2)O, Ni(OAc)(2)center dot 4H(2)O, Cu( OAc)(2)center dot H2O, Zn( OAc)(2)center dot 2H(2)O, Na(2)MoO(4)center dot 2H(2)O, WO2(acac)(2), ( NH4)(2)[ MoOCl5], ( pyH)(2)[ Mo( SCN)(6)], FeSO(4)center dot 7H(2)O and FeCl(3)center dot 6H(2)O under varied reaction conditions have been studied. The reactions of some of the new metal complexes isolated in this study have also been investigated with a view to develop new preparative methods. The Schiff base H4fsadien was found to act as a dibasic tetradentate ligand or as a dibasic pentadentate ligand, by using N2O2 or N3O2 donor sites, respectively. Elemental analyses, molecular weights, magnetic moment values, molar conductances and spectroscopic ( IR, UV-Vis and H-1 NMR) data characterize the complexes.