Reductive Activation of C₇₀ Equatorial Carbons and Structurally Characterized C₇₀ δ‑Adduct with Closed [5,6]-Ring Fusion

The C70 δ-adducts with closed [5,6]-ring fusion are an important type of compound in classifying bond delocalization in the equatorial belt of C70. However, the formation of such compounds is severely restricted due to the low reactivity of the carbon atoms in the flat equatorial region. Such a restriction is lifted when reduced anionic C70 species are used, where the inert equatorial carbon atoms are activated.