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Four molecular baskets 1–4, each comprising a modular bowl-shaped platform and a set of distinctive aromatic gates, were synthesized. The gates were made to incorporate a nitrogen heteroatom at different positions, as in 2–4, or without a coordinating nitrogen, as in 1 (Fig. 1). For polydentate 3 and 4, the location of the nitrogen was revealed to have an effect on directing the basket's coordination...
Chiral intramolecularly hydrogen-bonded dendrons that fold into a dynamically biased helical conformation can be 'locked' in kinetically controlled conformations by coordination to copper(II) metal centers. Covalent bonding of each pyridine-2,6-dicarboxamide repeat unit of the dendrons to a copper metal center forces this subunit to exist in only the syn-syn conformation and dramatically rigidifies...
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