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The H-bond mediated self-assembly of the chiral C 2 -symmetric bis-(2-amino-4-chloro-pyrimidines) 3 and 4 allows for the molecular recognition directed generation of helical superstructures. In the former case, unoccupied channel structures defined by the cylindrical interior of the derived supramolecular helix result, as revealed by X-ray crystallographic analysis using a synchrotron source...
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