Abstract-Twenty-six monoalkoxyfluorophosphoranes bearing an asymmetric substituent of types R1PF,(OR2*)(1), R1*PFs(ORz) (2), R1R3PFz(OR2*)(3) and R2PFz(OR2*)(4), have been prepared. The non-equivalence of the axial fluorine atoms is observed in the l9F NMR spectra for the compounds of types 1 6ra -6 p , -0.5 to 3.8 ppm, J(F,F,) -10 Hz, 2 fiFa -apta -1.1 to 1.
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