Abstract
The new Schiff base 14-membered macrocycles, 1,5,8,12-tetraazacyclotetradeca-6,7,13,14-tetraaminoacetic acid-5,7,12,14-tetraene (L
1
), 1,5,8,12-tetraazacyclotetradeca-6,7,13,14-tetraaminophenyl-5,7,12,14-tetraene (L
2
) and 1,5,8,12-tetraazacyclotetradeca-6,7,13,14-tetraaminopyridyl-5,7,12,14-tetraene (L
3
), have been synthesized by the reaction of N,N-dicarboxymethyloxamide, N,N-diphenyloxamide or N,N-dipyridyloxamide with 1,3-diaminopropane. Their complexes with Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) ions have been prepared and characterized by elemental analyses, IR,
1
H NMR and electronic spectra, magnetic moment and conductivity measurements. The complexes of the divalent metal ions are non-ionic while those of the trivalent metal ions appear to be 1:1 electrolytes. On the basis of these studies an octahedral geometry is proposed for all of the complexes.