COMPLEXES OF GAMMA-CYCLODEXTRIN WITH CROWN ETHERS, CRYPTANDS, CORONATES, AND CRYPTATES

Cascade complexes are comparable with a set of three interfitting dolls: γ‐cyclodextrin (γ‐CD)—a ring of eight glucose molecules—accommodates a small crown ether (see model) or cryptand, which in turm can take up a cation. The [12] crown‐4‐LiSCN complex and the [2.2.1] ⊂ Ca(SCN)2 cryptate from crystalline cascade complexes of stoichiometry 1:1 and 2:1, respectively, with γ‐CD from aqueous solution. (Figure Presented.) Copyright © 1979 by Verlag Chemie, GmbH, Germany