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Based on the complexation between bis(m-phenylene)-32-crown-10-based cryptands and a paraquat derivative, two [2]rotaxanes were synthesized by using a threading-followed-by-stoppering method. Due to the strong associations between the cryptands and the paraquat derivative, high yields were achieved even in dilute solution.

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The successful preparation of the first bis(m-phenylene)-32-crown-10/paraquat [2]rotaxane showed unambiguously that psuedorotaxane-type complexation, rather than the tacocomplex-type complexation previously observed in the solid state and in solution, exists -in solution -for complexation

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