A number of novel tetra-arylfluorophosphoranes have been synthesised. The most stable form of these compounds is the ionic form PR4+F–(R = aryl) although various other forms have been shown to exist including a molecular monomer PR4F and a dimer PR4+ PR4F2–. The i.r. spectra of the ionic forms reveal strong P+⋯ F– interactions. The fluorides are prepared via the hydrogendiflurides PR4+HF2– which contain distorted HF2– ions.
S. J. Brown, J. H. Clark and D. J. Macquarrie, J. Chem. Soc., Dalton Trans., 1988, 277 DOI: 10.1039/DT9880000277
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