spherand

spherand

[′sfir·ənd]
(organic chemistry)
A macrocyclic compound capable of completely enveloping a cation, having donor atoms (O, N, S) arranged such that they provide a solvation sphere to the encapsulated cation.
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References in periodicals archive ?
This "spherand,' depicted as a structural formula (near right) and as it would appear as a molecule (far right), has a cylindrical cavity with a diameter of 3 angstroms and a length of 8 angstroms.