Phosphorus-31 NMR studies

R. G. Weich, P. Lundberg, H. J. Vogel and P. Jensen (1989). Phosphorus-31 NMR studies of cell wall-associated calcium-phosphates in Viva lactuca. Plant Physiol., 90, 230-236. 

Harris, R. K., T. V. Thompson, P. R. Norman, and C. Pottage. 1999. Phosphorus-31 NMR studies of adsorption onto activated carbon. Carbon 37 1425-1430. 

J Phosphorus-31 NMR. - Positive chemical shifts, 63 ip, are downheld of the external reference 85% phosphoric acid, and are usually given without the appellation ppm. One-coordinate compounds studied include phosphaalkynes and their cyclotetramerisation. Two-coordinate compounds. The NMR data of the simple phosphaalkenes R CH=PR (R/R = H/H, H/Me, H/Et, Me/H, Me/ Me, Ph/H, and Ph/Me) have been reported for the first time, with 6 in the range + 179 to +285, and found to be consistent with the proposed structures. Stereochemistry of the (Z)- and (E)-isomers was established according to the cis-rule. The P and NMR data of a series of 40 iminophosphines, R-P=N-R, revealed that their E/Z stereochemistry can be predicted on the basis of a simultaneous comparison of the values of 831 p and Jpn- ... 

When our studies commenced it had been assumed that the mechanism of asymmetric hydrogenation by chelating rhodium phosphine complexes followed a similar pathway. It has been demonstrated, however, that the timing is quite different, and that oxidative addition of hydrogen to metal does not occur in the initial stages of reaction. This conclusion follows from studies on the phosphorus-31 NMR spectra of hydrogenated complex solutions made separately by Halpern,... 

Phosphorus-31 NMR spectroscopy - is very useful in studying phosphine complexes. Normally all the ligand protons are decoupled so as to simplify the spectra. The only common exception is the determination of n in H M(PR3) . This can be done by decoupling only the PR3 protons, while leaving the hydride protons undecoupled.The phosphorus resonance will then appear as an n -I- 1 multiplet. MoH6(PR3)3 could be identified only in this way, because it could only be obtained in an impure form. ... 

Many of these nickel carbonyl-base compounds have been prepared primarily for use in infrared studies, some of the conclusions of which are summarized briefly in Section II, C 30,41,46,47,48,50,51,127,349). The phosphine-nickel complexes have catalytic activity in the polymerization of acetylenes, and the mechanisms of these polymerizations have been studied 350, 351). Interest in these catalysts has led to an investigation of their phosphorus-31 NMR spectra, which may be qualitatively correlated with the accepted ideas on metal-ligand bonding (72). 

R27. Phosphorus-31 NMR techniques and membrane lipid structure Implications for mechanisms of membrane fusion Cullis, P. R. Farren, S. B. Hope, M. J. Can. J. Spect. 1981, 26, 89-95 (26 references). R28. Techniques to study metabolic changes at the cellular and organ level DeFuria, R. R. Dygert, M. K. Int. Rev. Cytol. 1983, 83, 27-62 (105 references). Review of ATP metabolism, with emphasis on phosphorus resonance. 

Phosphorus-31 NMR has been applied to the eye (Kopp et al., 1982), and the clinical relevance of such a study is >parent. We investigated three parts of the eye lens, cornea, and vitreous humor. 

While many elements can be studied using NMR spectroscopy, only those elements at the top of the periodic chart are commonly measured by soil chemists, and of those, carbon-13 (13C) and phosphorus-31 (31P) are the most frequently investigated. Phosphorus is of particular interest because it is an essential nutrient for both plants and animals. 

Phosphorus-31 solid state NMR of 1,3,2-benzodithiaphospholium and -thiazaphospholium salts has been studied <92IC3386). 

NMR is a versatile spectroscopic technique for studying opaque heterogeneous samples, which has already been proven to have a number of useful applications in dairy research (Duce et al., 1995). The technique is also suitable for at-line and on/in-line process control. NMR is based on the magnetic properties of the nucleus of certain atoms, such as the nucleus of the hydrogen atom, lH, the nucleus of carbon-13, 13C, and the nucleus of phosphorus-31, 31P. It is convenient to divide the parameters obtained from NMR spectra into static and dynamic parameters. 

Phosphorus-31 and NMR, together with X-ray crystallography, have been utilised by Naya and Nitta to study the structural nature of ylides (4a-d). Previous crystallographic studies had concluded that (4c) and (4d) do not contain formal P-O bonds but that appreciable coordinative interaction exists... 

Kaflak-Hachulska A, Chmielewski D, Gorecki A, Kolodziejski W (2001) Phosphorus-31 CP/NMR study of bone mineral. In Materials of the 2nd Alpine Conference on Solid-State NMR. Chamonix - Mont Blanc, France... 

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