Synthesis and Characterization of New Tetraazamacrocyclic Ligand and their Complexes with Co (II), Zn (II), Cd (II) , Re(V)

Abstract

A diethyl phthalate was reacted with 1,2-diaminoethane to produce the new tetradentat macrocyclic ligand [1,4,13, 16- tetraazacyclo (6,11- 18,23) tetracosa- (6,8,10(11),18,20,22(23)- hexane- 5,12,17,24- tetra one] (H4L).The reaction of this ligand with [ReOCl3(pph3)2] resulted in new trans-dioxo rhenium (V) complex of the general formula [ReO2(L)]-3 .Also the work includes the reaction of some metal ions with this ligand , and complexes of the general formula [M(HnL)X]-m(where: M=Co(II), n= 1, x=Cl2, m= 3; M= Zn(II),Cd(II), n= o, x = o, m=2) were prepared . All compounds have been characterized as needed by spectroscopic methods [IR,UVVis and Atomic absorption], microanalysis (C.H.N) along with conductivity measurements. The above studies show the geometry around Zn+2 and Cd+2 ions is tetrahedral structure, while the Co+2 and Re+5 complexes are forming octahedral structure.