Abstract:The singlet states of cyclopentadienyl (Cp) cations are considered as true prototypes of an antiaromatic system. Due to their high reactivity, their isolation in the solid state as a salt has so far failed. We present here the synthesis of the first room temperature-stable Cp cation salt Cp(C6F5)5Sb3F16 (1·Sb3F16) by single electron oxidation of the corresponding Cp radical Cp(C6F5)5∙ (2) with either an excess of XeF2 and SbF5·SO2 or by hydroxide abstraction from Cp(C6F5)5OH (D) with SbF5·SO2 in hexafluorobenz… Show more
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