Tellurium-125, chemical shift determination

It is evident from the above table that a considerable spread of chemical shift values is observed in tellurium-transition metal complexes, but the factors that determine the chemical shift are still poorly understood and data are not available for all known structural types. The most extensive compilations of data have been provided by Rauchfuss (187) and Herrmann (191), with the point being made in the former reference that chemical shifts are extremely sensitive to changes in cluster geometry. In principle, 12sTe NMR spectroscopy is a valuable method for studying tellurium-transition metal clusters in solution, but it is clear that more data are required before unambiguous structural assignments can be inferred. 

A review entitled New phosphorus-tellurium heterocycles in the quasi-binary system RP/Te , which contains and Te NMR data, has appeared. H/ H isotope effect on the translational and rotational motion of liquid water and ammonia has been assessed by NMR measurements.The diffusion of ammonia in binary mixtures has been investigated using the pulsed-field gradient technique. A quantitative structure-property relationship of the P NMR chemical shifts has been developed for a large set of phosphines.The NMR spectrum of [P(CF3)2] has been analysed as X3MAY3 and determined.An iterative lineshape analysis of N NMR spectra of [N3] has been described. and P NMR studies of a liquid-crystalline cyclotriphos-... 

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