A Simple and Convenient Route to Arylxenon (II) Tetrafluoroborates

摘要

An improved synthesis of arylxenon (II) salts is reported. The series of fluoro-containing arylxenon (II) tetrafluoroborates (aryl = C_6F_5, 2, 3, 4, 5-C_6HF_4, 3, 4, 5-C_6H_2F_3 and 3, 5-C_6H_3F_2) are prepared by the reaction of xenon difluoride with the corresponding aryldifluoroboranes. The salts [C_6F_5Xe][BF_4] and [2, 3, 4, 5-C_6HF_4Xe][BF_4] are long-term stable in anhydrous HF (aHF) solution at rt, while [3, 4, 5-C_6H_2F_3Xe][BF_4] and [3, 5-C_6H_3F_2Xe] [BF_4] are converted into 1, 2, 3, 5-tetrafluorobenzene and 1, 3, 5-trifluorobenzene, respectively, within a few hours.