Spin coupling constants phosphorus

Phosphorus—Phosphorus spin coupling constants through metal atoms have only been obtained recently. There are three distinct... 

There was no evidence for the alternative diphosphinoamines, R2P-N(Y)-PR2, in the P n.m.r. spectra, which revealed relatively large P-P spin-spin coupling constants (225—300 Hz), characteristic of directly-bonded phosphorus atoms. It is interesting to note that the two groups of compounds gave different types of sulphide on reaction with sulphur ... 

NMR data of 1,3,5-azoxaphosphorinanes (8) are analyzed in several references [73ZC( 13)291 74MI1]. The comparison of spin-spin coupling constants for 1,3,5-azoxaphosphorinanes with those for 1,3,5-dioxaphosphorinanes made it possible to establish the conformation of substituents in 1,3,5-azoxaphosphorinanes (83MI1). All four stereoisomers adopt a chair conformation with equatorial phenyl groups, including that at phosphorus. 

TABLE 7.74 Phosphorus-31 Spin Coupling Constants (Continued)... 

Platinum-19 5—Phosphorus-31 Spin—Spin Coupling Constants in Platinum (II) Complexes... 

Earlier correlations, relating the magnitude of the spin-spin coupling constant /p-N-p to the properties of the phosphorus substituents in cyclotri-phosphazenes, have been extended to include a wider range of endo- and exo-cyclic substituents. When carbon replaces phosphorus in rings of the type (25), /p-N-p is reduced by a constant factor for a given substituent, and it was... 

Table 1 One-bond phosphorus spin-spin coupling constants...

One-Bond Phosphorus Spin-Spin Coupling Constants /px... 

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