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 tetradentatmacrocyclic 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] resultedin new trans-dioxo rhenium (V) complex of the general formula [ReO2(L)]-3 .Also the workincludes 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) wereprepared . All compounds have been characterized as needed by spectroscopic methods [IR,UVVisand Atomic absorption], microanalysis (C.H.N) along with conductivity measurements. Theabove studies show the geometry around Zn+2 and Cd+2 ions is tetrahedral structure, while theCo+2 and Re+5 complexes are forming octahedral structure.