Complexation of 5,5,7,12,12,14-Hexamethyl-1,4,8,11-Tetraazayclotetradeca-7,14-Dienium Bromide With Copper Acetate In Methanol And Aqueous Solutions

Abstract

5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclodeca-7,14-dienium bromide disolvate ((Me6N4H4)Br2.2H2O) is a 14-membered deprotonated tetraaza macrocyclic salt. Its neutral analogues and their complexes were prepared by templation method under refluxed condition since it was discovered by Curtis in 1961. However, the present diprotonated tetraaza salts react with many metallic salts in both methanolic and aqueous solutions. The complexation involved deprotonation of the diagonally opposite protonated amines and the type of metal salt and solvents also play an important role in the final complex formation. The complexation of (Me6N4H4)Br2.2H2O with copper acetate in methanol and aqueous solutions gave the expected complex of [Cu((Me6N4H2)Br]Br.2H2O. Pseudo-first order condition for the complexation reaction in water was established.

Keywords

• Tetraaza, complexes, protonated , complexation, kinetics