Macrocyclic thioether-esters and ether-esters have been prepared by treating 2,2′-dithiobenzoic acid dichloride and 1,2-benzendicarboxylic acid dichloride with appropriate glycols or dithiol. The complexing ability of these thioether-esters and ether-esters toward Li+, Na+, K+, Mg 2 + , Ca 2 + , Sr 2+ , Ba 2 + , Co 2 + , and Ni 2 + has been measured by the solvent extraction method. The extraction data indicate that compound 2 exhibits stronger selectivity toward Li+, 3 toward Ba 2 + , 4 toward K+, 5 toward Mg 2 + , 6 toward Ba 2 + and Sr 2 + , and 7 toward Co 2 + and Ni 2 + when compared with other cations.
Notes
a Average for three samples.
b Organic phase (dichloromethane): (2–7 macrocycles) = 7.0 × 10− 4 M. Aqueous phase: (picric acid) = 7.0 × 10− 4 alkali, alkaline earth metal chloride; (transition metal hydroxide) = 0.1 M