Synthesis and characterization of a series of functional pendant-arm Schiff base macrocyclic complexes

A series of new functional pendant-arm Schiff base macrocyclic complexes ha ve been synthesized by template cyclocondensation between sodium 4-substitu ted phenolate and N,N-bis(2-aminoethyl)-8-methylquinolineamine and subseque nt in situ transmetallation by metal perchlorates. The reaction products of the corresponding Mn2+, Cd2+, Ni2+, and Zn2+ complexes have been character ized by elemental analyses, infrared and ES-MS spectra. The magnetic moment s of the dinuclear Mn(II) and Ni(II) complexes at room temperature suggest some antiferromagnetic interactions in these compounds. It is proposed that the metal ions in these complexes are located in distorted-octahedral (six -coordinated) or square-pyramidal (five-coordinated) geometries and the two pendant arms approach the metal ion at the opposite side of the macrocycle .