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Electrostatic potential surface of the anions d and e showing the efficient shielding of nucleophilic centers (red) in the anion by the CF3 groups. Calculation results are based on the density functional theory (B3LYP/6‐31G* method). Results obtained regarding the volume and surface are as follows: a: 84 Å3, b: 259 Å3, c: 433 Å3, d: 582 Å3, e: 501 Å3.
