Patterns of Multiple Additions to Fullerene C70: Isolation and Structural Characterization of [C70{Pt(PPh3)2}4]

Up to four platinum centers can be bound to C70, as the synthesis of [C70{Pt(PPh3)2}4] 1 with idealized C2v symmetry has shown. The four Pt(PPh3)2 groups are bound at two types of 6-6 ring junctions. The stepwise addition of Pt(PPh3)2 groups occurs initially to the most pyramidalized C-C bonds at the poles of the fullerene with subsequent additions to the adjacent 6-6 ring junctions.