Activation parameters for axial-equatorial fluorine exchange in arylfluorophosphoranes RC6H4PF3H, where R= o-CF3, m-CF3, p-CF3, m-CH3, were studied by the dynamic nmr technique: varied between 53 and 56 kJ mol-1. The synthesis of difluoromethoxyphenylphosphorane, PhPF2 (H) OMe, from PhPF2 and MeOH is catalyzed by small amounts of Et3N, pyridine, PhPF3H, or HF. Rapid intermolecular ligand ...
