Crown ethers, hydration dynamics

H-NMR is used extensively in studies of dynamics and disorder of guests and hosts in numerous supramo-lecular systems. These include clathrate hydrates, t-butylcalixarenes, cyclodextrins, metal cyanide clathrates, rn-orr/z(9-thymotide, crown ethers, Dianin s compound, urea, thiourea, and numerous others. The benzene and pyridine t-butylcalixarenes provide an example where there is agreement between the orientations of the guest molecules with respect to the calix axis determined by NMR and... 

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