Template synthesis and spectroscopic studies of 13-membered oxotetraaza macrocyclic complexes

1123-1125A new series of 13-membered tetraaza macrocyclic complexes has been prepared by the template condensation of triethylenetetraamine with ethyl acetoacetate or methyl acetoacetate in a 1:1 molar ratio. All the complexes are stable in atmosphere and soluble in DMSO and DMF. The complexes have been characterized on the basis of analytical, JR, 1H NMR, EPR, UV-vis, spectra, magnetic susceptibility and conductivity data. An octahedral geometry around the metal ion is suggested for manganese, cobalt, and zinc complexes, while a square-planar geometry is proposed for copper and nickel complexes

Synthesis and characterization of 13, 14-membered tetraazamacrocyclic complexes

450-452Oxotetraazamacrocyclic transition metal complexes, [ML1Cl2] or [ML2Cl2] [M=CoII , NiII , CuII and ZnII] have been synthesized by the template condensation reaction of o-aminobenzoic acid, diethylenetriamine and 1,3-dibromopropane or dibromoethane in methanol medium. All the complexes have been characterized on the basis of elemental analysis, IR, 1H NMR, EPR, UV-vis, conductivity and magnetic moment data. All the complexes are non-ionic in nature and exhibit an octahedral geometry

Synthesis and characterization of highly conjugated 22-membered octaazamacrocycles and their manganese(II), copper(II), cobalt(II) and zinc(II) complexes

1090-1092A new series of 21-membered macrocyclic complexes [MLX2] [M=Mn(II), Co(II), Ni(II), Cu(II) and Zn(II); X=Cl or NO3] has been synthesized by template reaction of phthalaldehyde with hydrazine hydrate and 2,4-pentanedione in methanol. The over-all Geometry and stereochemistry of these complexes have been elucidated by IR, 1H NMR, EPR, UV-vis, magnetic susceptibility and conductance values. An octahedral geometry around the metal ion is suggested for all the complexes