The synthesis of Me3·Si(Me)NPF4, the first silylamino-substituted phosphorane, is described; variable temperature 19F n.m.r. data indicate that the molecule is fluxional, with the silylamino group occupying an equatorial site of a trigonal bipyramid in the ground state.
A. H. Cowley and R. C. Lee, J. Chem. Soc., Chem. Commun., 1977, 111b DOI: 10.1039/C3977000111B
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