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Organic photochemistry

Exciting excited-state aromaticity

In 1972, Baird published rules describing aromaticity and antiaromaticity in the lowest triplet excited states of annulenes. The fortieth anniversary of Baird's rules — which are the reverse of Hückel's rules for aromaticity and antiaromaticity in the ground state — ought to be celebrated before 2012 comes to an end.

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Figure 1: Excited-state aromaticity.


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Correspondence to Henrik Ottosson.

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Ottosson, H. Exciting excited-state aromaticity. Nature Chem 4, 969–971 (2012).

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