Crystal structures of C60N2(C2H4)2 and C60{&(C2H4)2)2 show that addition occurs with elongation of the C-C bond at the 6: 6 ring junction to which the two nitrogen atoms are bonded; electrochemical one-electron reduction potentials of these adducts are shifted by ca. 0.1 V to more negative values for each added group.
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