Photochemical functionalization of C60 with cyclosilanes and cyclogermane

Article abstract of DOI:10.1016/0040-4020(96)00107-X

The photochemical reaction of 3,4-benzo-1,2-disilacyclobutene 1 with C₆₀ afforded stable 1:1 adduct 2 with C(2v) symmetry. The photochemical reaction of cyclotetrasilane 4a with C₆₀ afforded adducts 5a and 6a, the latter was obtained from a rearrangement of the cyclotetrasilane unit. Similarly, cyclotetragermanes, 4c, gave 5c and the rearranged product 6c. In the case of cyclotrasilane 4b, only the rearranged product 6b was obtained in high yield. The structure of all compounds were determined by spectroscopic methods, including ²⁹Si-¹H HMBC hetero nuclear shift correlation experiments.