A new synthetic route for the preparation of a new series of 14–22-membered tetraoxomacrocyclic tetraamines and their transition metal complexes

摘要: Abstract The condensation of aliphatic diamines H 2 N(CH ) n NH ( = 2–3) with dicarboxylic acids in the presence DCC (dicyclohexylcarbodiimide) and DMAP [4-(dimethylamino)pyridine] gave new types 14–22-membered tetraamide macrocyclic ligands L 1 L 10 which were characterized by element analysis mass, IR NMR spectroscopic techniques. complexes these moieties some transition metal ions have also been synthesized. mode bonding overall geometry has inferred through UV-vis, IR, ESR spectral techniques as well molar conductance magnetic moment data. An octahedral around ion is suggested for [ML Cl ]-[ML ], where M Mn II , Fe Co while a square planar, distorted tetrahedral proposed ]Cl -[ML Ni Cu Zn respectively. Bonding parameters derived from hyperfine structure copper cobalt complexes.