Phosphorus-31 couplings

Rehder, D. (1977) Vanadium-51 chemical shift and vanadium-51-phosphorus-31 coupling in carbonyl complexes of vanadium./. Mag. Res., 25, 177-181. 

Poraij-Koshits MA (1978) Structural effects of mutual influence of ligands in transition- and non-transition-metal complexes. Koordinatsionnaya Khimiya 4 842-866 (in Russian) Hartley FR (1973) The cis- and trans-effects of ligands. Chem SocRev 2 163-179 Russell DR, Mazid MA, Tucker PA (1980) Crystal structures of hydrido-tris(triethyl-phosphine)platinum(II), fluoro-tris(triethylphosphine)platinum(lD, and chloro-tris(trieth-ylphosphine)platinum(II) salts. J Chem Soc Dalton Trans 1737-1742 Blau R, Espenson J (1986) Correlations of platinum-195-phosphorus-31 coupling constants with platinum-hgand and platinum-platinum bond lengths. Inotg Chem 25 878-880 Belsky VK, Konovalov 1, Kukushkin VYu (1991) Structure of cis-dichloro-(dimethyl-sulfoxide)-(pyridine)platinum(II). Acta Cryst C47 292-294... 

Nitrogen-15 NMR, 9,11,26,33,40,44-46,99,207-40,379-80,410 also see Nitrogen-14 NMR Nitrogen-15—phosphorus-31 couplings, 229 Nitrogen-15—proton couplings, 222-25,234 Nitroso compounds, N chemical shifts, 219-20 N-Nitrosoproline, 141,143 Nocardicin A, 138-39 NOE... 

Phosphorus-31—tritrium couplings see Tritium—phosphorus-31 couplings Platinum chemical shift, 452 Platinum-195 NMR, 3,8,101,446,452 Platinum-195—tin-119 couplings see Tin-119—platinum-195 couplings Polarization transfer see Cross polarization and INEPT Polyamides, chemical shift, 237-38 Polyelectrolyte, 325 Poly-L-glutamic acid, 147-48 Polymers, glassy, 365 Polymorphism, 371-72... 

Fig. 22a,b Phosphorus-31 spectra of compound 1. a Protons decoupled b proton-phosphorus coupling present... 

The binuclear Rh-complex in Figure 11.2 contains two hydride resonances at -11.18 and -14.75 ppm [21]. The former has two smaller phosphorus couplings... 

In these earlier studies the phosphine ligand at the rhodium(I) center has been shown to be trans to the //-h ydride with a phosphorus coupling of JHp(trans) = 30 Hz and 32 Hz, respectively. Therefore, we assign to complex 8 the structure as outlined in Scheme 12.1. 

Comparison of some calculated and experimental phosphorus coupling constants... 

In relation to the consideration of the stereospecificity of coupling in Pm compounds, an observation of Kainosho<1969,95) seems especially important. Complexing the phosphorus atom by addition of a paramagnetic ion removes any stereospecific phosphorus couplings. In the phosphorinane 55a, 3J(POCHA) = 2-2 and aJ(POCHB) = 10-5 Hz but on increasing the concentration of nickel acetylacetonate in solution first... 

Observations on O-phenyl compounds have been mentioned previously (Section III.B.7(f)) in these compounds the phosphorus coupling to the para protons is as great as that to the ortho protons (1966> 75 i967,ii7) which leads to similar conclusions regarding the geometry of such derivatives and the coupling mechanism. 

A third electron is then transferred from the contact with the K—Na alloy, forming the paramagnetic radical trianion 67. The phosphorus coupling constant in 67 of dp = 4,6 was calculated from the ESR spectmm of 2.4.6-tris-pentadeutero-phenyl-X -phosphorin. 

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