%0 Journal Article %A Maroto, Enrique %A Mateos, Jaime %A García Borràs, Marc %A Osuna, Silvia %A Filippone, Salvatore %A Herranz, M.Angeles %A Murata, Yasujiro %A Solà, Miquel %A Martín, Nazario %T Enantiospecific cis−trans Isomerization in Chiral Fulleropyrrolidines:Hydrogen-Bonding Assistance in the Carbanion Stabilization in H2O@C60 %D 2015 %@ 1520-5126 %U https://hdl.handle.net/20.500.14352/35074 %X 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 findings. 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. %~