Molecular design of crown ethers. 1. Effects of methylene chain length: 15-to 17-crown-5 and 18-to 22-crown-6

…, Y Inoue, T Kanzaki, T Hakushi

Index: Ouchi, Mikio; Inoue, Yoshihisa; Kanzaki, Takashi; Hakushi, Tadao Journal of Organic Chemistry, 1984 , vol. 49, p. 1408 - 1412

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Citation Number: 191

Abstract

The ring-enlarged crown ethers, 16-and 17-crown-5 and 19-to 22-crown-6, were synthesized and their cat-ion-binding abilities were evaluated by solvent extraction of aqueous alkali metal picrates. The cation-binding abilities of less symmetrical crown ethers, 3a-e and 4a, b, were generally lower than those of the common symmetrical crown ethers 15- crown-5 (5a) and 18-crown-6 (Fib), for which the less symmetrical arrangement of the ...