A rich diversity of structural motifs have been uncovered in a family of crown-ether-coordinated alkali metal pyridine-2-thiolates, featuring a templated dimer and polymer (depicted below), an asymmetrically coordinated monomer, and an unprecedented separated ion quadruple with two unusual sodium metalates. Crown ether/alkali metal pairings based on a mismatch between macrocycle cavity size and cationic radius can have profound consequences for the solid-state structural chemistry of the product.
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Chadwick et al. (1998) studied this question.
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