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Use of Trisdipivalomethanatoeuropium(III) as a nuclear resonance chemical shift reagent in the analysis of the spectra of some sulfoxides

✍ Scribed by Kenneth K. Andersen; J. John Uebel

Publisher: Elsevier Science
Year: 1970
Tongue: French
Weight: 164 KB
Volume: 11
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)99987-8

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✦ Synopsis

Pseudocontact effects between a paramagnetic metal ion and its ligands have proven helpful in the past in interpreting the nmr spectrum, in particular the proton n.m.r. spectrum, of the ligands.' Unusually large chemical shifts spread out a spectrum, simplify it, and often make it amenable to first order analysis. Recently, Hinckley 2,3 has pointed out that the dipyridine adduct of trisdipivalomethanatoeuropium(III), Eu(DPM)~*~P~, when added to solutions of alcohols, ketones, and other molecules capable of complexing with the europium, caused downfield shifts of the protons which were a function of the distance of the proton from the europium and which consequently simplified the spectral analyses. Sanders and Williams4 showed that Eu(DPM)~ is

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