Example 023

[π14a + π2s] Cycloaddition of heptafulvalene to tetracyanoethene (TCNE)

[14 + 2] Cycloaddition of heptafulvalene to tetracyanoethene
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R. B. Woodward and R. Hoffmann, Angew. Chem., Int. Ed., 1969, 8, 781–932 (see reference 99 in this work)
DOI: 10.1002/anie.196907811