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+, Mg2 +, Ca2 +, Sr2+, Ba2 +, Co2 +, and Ni2 + has been measured by the solvent extraction method. The extraction data indicate that compound 2 exhibits stronger selectivity toward Li+, 3 toward Ba2 +, 4 toward K+, 5 toward Mg2 +, 6 toward Ba2 + and Sr2 +, and 7 toward Co2 + and Ni2 + when compared with other cations.

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