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Evidence for Contact and Pseudo-Contact Contributions in Lanthanide-Induced 31P N.M.R. Shifts

โœ Scribed by Jeremy K.M. Sanders; Dudley H. Williams

Publisher
Elsevier Science
Year
1971
Tongue
French
Weight
183 KB
Volume
12
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

The remarkable p.m.r. shift properties of Eu(DPM)~ and related compounds have recently been extensively studied, l-4 and have been employed successfully to solve several otherwise difficult problems. 5-a With few exceptions, however, published work in this field has been largely descriptive, and in our recent studies we have been investigating the hitherto neglected area of the actual physical processes involved: the analysis of stoichiometry and equilibria for mono-and bi-functional systems, the solution dimerisation of Eu(DPM)~, variation of angular

๐Ÿ“œ SIMILAR VOLUMES

On the lack of evidence for contact cont
On the lack of evidence for contact contributions to lanthanide-induced N.M.R. shifts (L.I.S.'s) in aromatic aldehydes: a rigorous error analysis and the isolation of diamagnetic (complexation) shifts.
โœ Raymond J Abraham; Derek J Chadwick ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 256 KB

The adoption of a rigorous error analysis of L.I .S. 's allows the non-pseudo-contact components of the Yb(fod)a induced shifts in benzaldehyde and thiophen-Z-aldehyde to be isolated. They are largest at the carbonyl carbon and at the ortho and pam carbons and appear to be entirely due to complexat