Synthesis and physico-chemical studies on transition metal complexes of macrocyclic ligand derived from 2,6-diacetylpyridine dihydrazone

556-561A novel series of Schiff base decaazamacrocyclic complexes [ML/ X2] [M = Mn(II), Fe(II), Co(II), Ni(II) and Zn (II)] ; and [CuL/]X2 ( X = Cl, NO3) have been synthesized by the reaction between pre-synthesized 2,6-diacetylpyridine dihydrazone (L) and formaldehyde in the presence or metal ions in methanol medium at room temperature.The formation of ligand (L) and the proposed macrocyclic complexes have been confirmed from the results of elemental analyses, the comparative band positions for v(C=N) and appearance of proton resonance peaks for secondary amine group (N-NH-C) in 1H NMR spectra of complexes. The nature of the complexes and their overall geometry have been inferred from electrical conductivity data, observed band positions in electronic spectra and magnetic moment values