[3]Pseudorotaxane-like complexes formed between bipyridinium dications and bis-p-xylyl[26]crown-6.

@article{Cheng20063PseudorotaxanelikeCF,
  title={[3]Pseudorotaxane-like complexes formed between bipyridinium dications and bis-p-xylyl[26]crown-6.},
  author={Pin-Nan Cheng and Chi-Feng Lin and Yi-Huang Liu and Chien-Chen Lai and Shie-Ming Peng and Sheng-Hsien Chiu},
  journal={Organic letters},
  year={2006},
  volume={8 3},
  pages={435-8}
}
[structure: see text]. The crown ether BPX26C6 forms a [3]pseudorotaxane-like complex with the N,N'-dimethyl-4,4'-bipyridinium dication both in solution and in the solid state. The facile one-pot synthesis of a [2]rotaxane from neutral precursors-BPX26C6, 4,4'-dipyridyl, and 3,5-di-tert-butylbenzyl bromide-suggests that BPX26C6 may bind to (mono)pyridinium cations in a [2]pseudorotaxane-like manner. 

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