Since their introduction2 the nmr shift reagents, tris(dipivalomethanato)europium(II1) and tris(dipivalomethanato)praseodymium(III), have experienced immediate and marked popularity.
On the Complex Formation of Tris-(dipivalomethanato)-europium with Pyridine
β Scribed by H. Huber; J. Seelig
- Publisher
- John Wiley and Sons
- Year
- 1972
- Tongue
- German
- Weight
- 221 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0018-019X
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β¦ Synopsis
Abstract
The complexation of the shift reagent trisβ(dipivalomethanato)βeuropium with pyridine in deuteriochloroform has been studied by means of ^1^HβNMR. Shift parameters S = 28.0, 9.9, and 9.2 ppm respectively for pyridine protons 2, 3 and 4 are obtained. The results indicate that the shift reagent complexes a single pyridine molecule with an association constant K~1~ > 100 mole^β1^l.
π SIMILAR VOLUMES
We wish to report the synthesis and re-identification of 3-~-pytano[3,2-~qulnoline-3-one (I), and to correct the data on physical properties given for I by Dep and Gomamil. We also wish to describe the use of the recently reported2 &&-(dipivalomethanato)europiun, Eu(DPM)~, as a shift reagent in the