Tris-bipyridyl cryptand

Since the concept of endohedral fullerenes is important in the context of the current presentation, the CPK structure of C50 is presented in figure 1 next to the structure of a cryptate, in this case the lanthanum complex of tris-bipyridyl cryptand, [La(bipy)3]. For the sake of the argument being presented here, assume that the 60 is really an endohedral complex of some metallic ion or ions. 

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