Solvation-Free Li⁺ Lewis Acid Enhancing Reaction: Kinetic Study of [5,6]-Li⁺@PCBM to [6,6]-Li⁺@PCBM

Kinetic parameters for the [5,6]- to [6,6]-[Li⁺@PCBM]­TFSI^– transformation were determined experimentally, revealing a ca. 700-fold faster reaction rate at 423 K than empty PCBM and a 57.4 kJ mol^–1 lower activation energy. The encapsulated Li⁺ can be considered as solvation-free Li⁺, forming a 1:1 complex with the substrate.