The synthesis and characterization of various macrocyclic schiff bases and complexes with template effect

In this study, aldehydes were prepared by reaction of potassium salt of salicylaldehydewith dibromoalkane derivatives or tosilat esters of diol. Then, Macrocyclic Schiff bases[1,3,5-Triaza-2,4:7,8:13,14-tribenzo-9,12-dioksa-siklopentadeca-1,5-dien(L1), 1,3,5-Triaza-2,4:7,8:,14,15-tribenzo-9,13-dioksasiklohekxadeca-1,5-dien(L2), 1,3,5-Triaza-2,4:7,8:15,16-tribenzo-9,15-dioksasiklo-heptadeca-1,5-dien(L3), 1,3,5-Triaza-2,4:7,8:16,17-tribenzo-9,12,15-trioksasiklooctadeca-1,5-dien(L4), 1,3,5-Triaza-2,4:7,8:19,20-tribenzo-9,12,15,18-tetraoksasiklouncosa-1,5-dien(L5)] were synthesized by reaction of 2,6-diaminopyridine and1,2-Bis(2-carboxyaldehyde fenoxy)ethane, 1,3-Bis(2-carboxyaldehyde fenoxy)propane, 1,4-Bis(2-carboxyaldehyde fenoxy)butane, 1,7-Bis(2-formylphenyl)-1,4,7-trioksaheptane, 1,10-Bis(2-formylphenyl)-1,4,7,10-trioksadecane in methanol respectively. Then, metal complexeswere synthesized from 2,6-diaminopyridine with 1,2-Bis(2-carboxyaldehyde fenoxy)ethane,1,3-Bis(2-carboxyaldehyde fenoxy)propane, 1,4-Bis(2-carboxyaldehyde fenoxy)butane, 1,7-Bis(2-formylphenyl)-1,4,7-trioksaheptane, 1,10-Bis(2-formylphenyl)-1,4,7,10-trioksadecaneand Pb(NO3)2, Cu(NO3)2.3H2O, Ni(NO3)2.6H2O, Co(NO3)2.6H2O, La(NO3)3.6H2O inmethanol with template effect respectively. The structure of the ligands and their complexeswere characterized by Elemental Analyses, Magnetic Susseptibility, FTIR, UV-Vis,Conductance Measurements, 1H-NMR and 13C-NMR spectra, Mass Spectra and TGA.Key words: 2,6-diaminopyridine, Macrocyclic Schiff bases, Macrocyclic Schiff BaseComplexes, Aromatic Aldehydes.