19 F n.m.r. data are presented for 2-methyl-,3-methyl-, and 4-methyl-piperidylfluorophosphoranes in which the magnetic equivalence or non-equivalence of the axial or equatorial fluorine atoms is dependent on the position of the methyl group on the piperidyl ring and position of the ring with reference to the trigonal bipyramidal structure.
M. J. C. Hewson, S. C. Peake and R. Schmutzler, J. Chem. Soc. D, 1971, 1454 DOI: 10.1039/C29710001454
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