8 and 16-Membered Ring Phosphorus Compounds. Ring Size Dependence of the NMR Parameters

Article abstract of DOI:10.1002/mrc.1270150118

The 1H NMR spectral analysis of four 8-membered rings, 2-thioxo- (or 2-oxo) 2-R-1,3,6,2-trithiaphosphocane is reported.The stereochemistry of the 8-membered ring is discussed.The 31P NMR spectral parameters < δ 31P, ¹J(PC)> obtained on several cyclic 1,3,2-dithiaphospha compounds of variable size (5, 6, 8, 12 and 16-membered rings) are discussed as a function of the ring size and of the geometry of the molecule.