Journal
INORGANIC CHEMISTRY
Volume 42, Issue 5, Pages 1397-1399Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic0263140
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A new class of tetraamide macrocyclic receptors for anions with two quaternized amine functionalities exhibited higher affinities for anions compared with the corresponding neutral amides. In two crystal structures of halide complexes of the prototypes with phenyl and pyridine spacers, the anions are held by hydrogen bonding with the amide hydrogens. The pyridine analogues display higher affinities in general than the phenyl systems, a phenomenon which is attributed to the anion version of the chelate effect.
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