Synthesis and structural studies of bis(macrocyclic) dimetal (II) complexes based on 14-18 membered pentaaza unit

Abstract

Bis(macrocyclic) binuclear metal complexes of the type [M₂LCl₄) [where 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 1, 3-diaminopropane, with formaldehyde, benzidine and acetylacetone or dibenzoylmethane or phthalaldehyde in 4:4:1:2 molar ratio. All these complexes have been characterized by elemental analysis, IR, ¹H NMR, EPR and UV/VIS and conductivity data as well as magnetic susceptibility measurements. An octahedral geometry is suggested for all the complexes.