New Perfluoroalkylphosphonic and Bis(perfluoroalkyl)phosphinic Acids and Their Precursors

Abstract

Some new routes to the previously known acids (Rf)2P(O)OH and RfP(O)(OH)2 (Rf = CF3, n-C4F9) as well as to the new acids (C2F5)2P(O)OH and C2F5P(O)(OH)2 are reported. In addition, several mixed chloro(perfluoroalkyl)phosphorus(III) and-(V) compounds have been synthesized as reaction precursors, including (C2F5)2PCl3, C2F5PCl4, (C2F5)2PCl, C2F5PCl2, (C2F5)2P(O)Cl, and C2F5P(O)Cl2. Under certain conditions, when chlorophosphines are oxidized with an excess of NO2, acid anhydrides result, e.g., (C2F5)2P(O)OP(O)(C2F5)2 and c-(C2F5PO2)3. © 1986, American Chemical Society. All rights reserved.