SCHEDULED MAINTENANCE
An acyclic oligomeric polyether in which four tetraethylene glycol units are located between five hydroquinol rings, with the two terminal rings carrying benzyl ether groups, self-assembles in solution with one and two molar equivalents of a tetracationic cyclobis(paraquat-p-phenylene) macrocycle to afford, respectively and selectively, a [2]pseudorotaxane and a [3]pseudorotaxane.
P. R. Ashton, D. Philip, N. Spencer and J. F. Stoddart, J. Chem. Soc., Chem. Commun., 1991, 1677 DOI: 10.1039/C39910001677
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