17O NMR studies on dialkoxy disulfides
β Scribed by Giovanni Cerioni; Antonio Plumitallo
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 154 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0749-1581
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Natural abundance 17O NMR spectra of 41 2,2-diacylenamines (enamino diketones and enamino diesters), recorded in acetonitrile solution, are reported. Tertiary enamino diketones show only one 17O signal ; primary and secondary derivatives show two 17O signals. The shift di β erence between the two car
Fast water exchange rate constants on diamagnetic metal ions can be measured using either a paramagnetic chemical shift agent or a paramagnetic relaxation agent. An approximate analytical equation was developed for the chemical shift agent method, valid in the limit of rapid exchange. The limits of