Simplified NMR spectra of bifunctional tropanes induced by the paramagnetic shift reagent tris(dipivalomethanato)europium(III)
✍ Scribed by Gary S. Chappell; Bernard F. Grabowski; Robert A. Sandmann; David M. Yourtee
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 566 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0022-3549
No coin nor oath required. For personal study only.
✦ Synopsis
I J Tris(dipivalomethanato)e~opium(llI) has beem used as an NMR shift reagent to obtain simpli6ed spectra of tropine, of coordination was secondary amine > secondary alcohol > tertiary amine h ketone. . . .~ systems containing two different heteroatoms. The observed order tra of bifuictionai tropanes Tris(dipivalomethanato)europium(III) (I) has been the most extensively studied of the NMR shift reagents now available. This reagent produces paramagnetic shifts that remarkably simplify the NMR spectra of com-pounds containing heteroatoms for coordinative bonding with the reagent lanthanide. The europium deshielded NMR represents a timeaveraged spectrum between free substrate molecules