SYNTHESIS OF AZOBENZO-CROWN ETHERS AND THEIR COMPLEXATION BEHAVIOR WITH METAL IONS.

Abstract

New crown ethers which have a benzeneazo group as a building block of a macrocyclic polyether ring. The complexation properties of these new azobenzo-crown ethers with alkali and alkaline earth metal iodide salts were investigated in acetonitrile solution spectrophotometrically. The complex formation constants were evaluated for alkali metal salts. The azo group is not particularly a favorable component of a crown ether macrocycle for stabilizing the metal complexes.