Proton‐ionizable crown compounds. 6. synthesis and structural studies of new crown compounds containing sulfonamide groups

Abstract
Two new aza crown ethers, each containing two proton‐ionizable sulfonamide groups, have been synthesized by reacting o‐phenylenediamine with a bis‐sulfonyl chloride. These compounds transport alkali metal cations in a water‐methylene chloride‐water liquid membrane system at source phase pH values above 12. The crystal structure of one of the crown compounds was determined.

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