@Article{, title={Structural and Spectroscopic Study of Novel Tetradentate Macrocyclic Ligand Type N4and It’s Complexes with CrIII, MnII, FeII, CoII,NiII ,CuII, PdII and CdII}, author={A. S. Mohammed and S.M.Lateef and M.J. Al-Jeboori}, journal={Ibn Al-Haitham Journal For Pure and Applied Sciences مجلة ابن الهيثم للعلوم الصرفة والتطبيقية}, volume={22}, number={4}, pages={110-118}, year={2009}, abstract={Ethylenediamine was reacted in the first step with 2,5 – hexandion to produce the precursor [A] , then [A] was reacted with diethylmalonate to give the new tetradentate macrocyclic Ligand [H2L].This Ligand was reacted with some metal ions in ethanol to give a series of new metal complexes of the general formula [M(HnL)X]m ( where : M= CrIII , n = 0 , X= Cl2 , m= -1 ; M = MnII , FeII , NiII , CuII , n = 1 , X= Cl2 , m = -1 ; M = CoII , n = 0 , X = Cl , m = -1 ; M = PdII , n = 0 , X=0 , m = 0 ; M = CdII , n = 2 , X = 0 , m = +2 . All compounds were characterized by spectroscopic methods [I.R, U.V-Vis , HPLC , Atomic Absorption] , microanalysis of elements (C.H.N) along with conductivity measurements . From the above date the proposed molecular structure for CrIII , MnII , FeII , NiII and CuII complexes is octahedral, While CoII , PdII, and CdII form trigonal bipyramid , square planar and tetrahedral geometries respectively .

} }