Abstract

M. B. H. Howlader* and M. S. Islam

16-Membered macrocyclic complexes are formed by the reaction of malonodihydrazide with chromium(III), manganese(II), iron(III), cobalt(II), nickel(II) and copper(II) chlorides in presence of acetaldehyde. The template conensation products, containing a 1,2,6,7,9,10,14,15-octaaza-8,16-dimethylcyclohexadecane-3,5,11,13-tetra-one ligand (L = C10H20N8O4). The complexes are characterized by elemental analysis, magnetic moment and conductance measurements, infrared, UV-visible and mass spectroscopic studies. The complexes of the type [M(L)Cl2] (M = Mn, Co, Ni, Cu) and [M(L)Cl2]Cl (M = Cr, Fe) are all octahedral in nature.

Macrocyclic complexes; Transition metals; Template condensation

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