In pursuit of the PO2+ cation. The reaction of KPO2F2 and SbF5 leads to aneight-membered antimony-oxygen-phosphorus-bridged ring

The reaction of KPO2F2 with the strong Lewis acid SbF5 was studied as a pot ential pathway to the unknown PO2+ cation. The resulting product has the de sired PO2SbF6 composition but consists of an eight-membered, antimony-oxyge n-phosphorus-bridged ring that was characterized by vibrational and NMR spe ctroscopy, ab initio methods, and a Institute. University of Southern Calif ornia. University Park single crystal x-ray diffraction study. The preferre d formation of the ring and its mechanism are discussed.