Enantiospecific cis-trans isomerization in chiral fulleropyrrolidines: Hydrogen-bonding assistance in the carbanion stabilization in H2O@C60

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The stereochemical outcome of cis-trans isomerization of optically pure [60], [70], and endohedral H2O@C60 fulleropyrrolidines reveals that the electronic nature of substituents, fullerene size, and surprisingly the incarcerated water molecule plays a crucial role in this rearrangement process. Theoretical DFT calculations are in very good agreement with the experimental fi ndings. On the basis of the experimental results and computational calculations, a plausible reaction mechanism involving the hydrogen-bonding assistance of the inner water molecule in the carbanion stabilization of endofullerene is proposed ​
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