The synthesis of [5]CPP, the smallest and by far the most strained member of the family of macrocycles known as cycloparaphenylenes, has been reported in quick succession by two different research groups. But how long will the new record holder retain its title?
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Bodwell, G. Closing the loop. Nature Chem 6, 383–385 (2014). https://doi.org/10.1038/nchem.1932
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DOI: https://doi.org/10.1038/nchem.1932
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