Unprecedented Chemical Reactivity of a Paramagnetic Endohedral Metallofullerene La@Cs-C82 that Le...

Synthesizing unprecedented diamagnetic adducts of an endohedral metallofullerene was achieved by using 1,3-dipolar cycloaddition reaction of paramagnetic La@Cs-C82 with a simultaneous hydrogen addition. The selective formation of two main products, La@Cs-C82HCMe2NMeCHPh (2a and 2b), was first detected by HPLC analysis and MALDI-TOF mass spectrometry. 2a and 2b-O, which was readily formed by the oxidation of 2b, were isolated by multistep HPLC separation and were fully characterized by spectro...