Fluorine in charge! The fluorine-iminium ion gauche effect has been exploited in the design of conformational probes for organocatalysis (see scheme). Stabilizing hyperconjugative [σ C- H→σ*C-F] and/or electrostatic [N+ F δ-] interactions render the C-F bond an excellent steering group for controlling molecular topology without introducing additional steric constraints.
- Conformational analysis
- Density functional calculations
- Electron diffraction
- Laser desorption
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