Synthesis and Spectroscopic Studies of Bis(Macrocyclic) Dimetal(II) Complexes Based on 14–18 Membered Pentaaza Units

Abstract

Bis (macrocyclic) binuclear transition metal complexes [M2LC14] [M = Fe(II), Co(II), Ni(II), Cu(II) and Zn(II); L = L1-L6, have been synthesised by the template condensation reaction of ethylenediamine or l,3-diaminopropane with formaldehyde, benzidine and acetylacetone or dibenzoyl methane or phthalaldehyde in 4:4:1:2:2 molar ratio. All prepared complexes have been characterized by elemental analyses, IR, 1H NMR, EPR and UV/VIS and conductivity data as well as magnetic susceptibility measurements. An octahedral geometry is suggested for all complexes.