Molecular box treats chemists to a strained surprise

Introducing pillar[4]pyridinium – the first of a new family of macrocycles

Source: Grzegorz Sobczak Oksana Danylyuk and Volodymyr Sashuk

Scientists in Poland have made the most compact multiply charged macrocycle to date. Pillar[4]pyridinium is a cyclic tetramer consisting of four pyridyl units with methylene bridges between their nitrogens and para carbons. The quadruply charged molecule has a very symmetrical and incredibly strained structure. It represents a new class of cationic macrocycles, the pillar[n]pyridiniums.

Read the full story by Jennifer Newton on Chemistry World.

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