DIFLUOROTHIOPHOSPHORYL-MU-THIO-DIFLUOROPHOSPHINE AND DIFLUOROPHOSPHORYL-MU-OXO-DIFLUOROPHOSPHINE . NOVEL MIXED-VALENCE FLUOROPHOSPHORUS COMPOUNDS

The compound F4P2S2, a moderately stable volatile liquid (bp 85.7°), has been prepared by the reaction of iodothiophosphoryl difluoride with a stoichiometric quantity of mercury and by the reaction of difluorodithiophosphoric acid with dimethylaminodifluorophosphine, The reaction of difluorophosphoric acid with dimethylaminodifluorophosphine gives the considerably less stable oxygen analog F4P2O2 (bp 50°). Infrared and nuclear magnetic resonance spectral measurements and chemical studies indicate that the compounds do not have a phosphorus-phosphorus bonded structure but rather the isomeric structure F2P(=E)EPF2 (E = S,O ) with trivalent and pentavalent phosphorus linked by a sulfur- or an oxygenbridging atom. © 1969, American Chemical Society. All rights reserved.