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, FTIR, UV-Vis, molar conductivity measurements, ¹H 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 (Λ_m) in DMSO at 10⁻³ mol L⁻¹. The configurations of La(III) and Zn(II) complexes are proposed to probably octahedral.