Synthesis and spectral studies of macrocyclic Pb(II), Zn(II) and La(III) complexes by template reaction of 1,4-bis(3-aminopropoxy)butane with metal nitrate and salicylaldehyde derivatives

Abstract

Six new macrocyclic complexes are synthesised by template reaction of 1,4-bis(3-aminopropoxy)butane with metal nitrate and 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane or 1,10-bis(2-formylphenyl)-1,4,7,10-tetraoxadecane and their structures are proposed on the basis of elemental analysis, FT-IR, UV-Vis, molar conductivity measurements, H-1 NMR and mass spectra. The complexes are 1: 2 electrolytes for Pb(II), Zn(II) complexes and 1:3 electrolytes for La(III) as shown by their molar conductivities (Lambda(m)) in DMSO at 10(-3) mol L-1. The configurations of La(III) and Zn(II) complexes are proposed to probably octahedral.