NMR spectroscopy in the study of carbohydrates: Characterizing the structural complexity
β Scribed by Bubb, William A.
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 377 KB
- Volume
- 19A
- Category
- Article
- ISSN
- 1043-7347
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The effect on the solid-state 'Li chemical shifts and quadrupolar coupling constants of different locations of the lithium cation relative to the carbanion framework of delocalized carbanions was investigated. When the lithium cation is situated above the conjugated system, the chemical shift is abo
## Abstract The natural abundance ^15^NβNMR spectra of streptomycin and dihydrostreptomycin in aqueous solution at pH 5 show conclusively that the aldehyde group of streptomycin does not react with the methylamino or guanidino groups internally to form a fourβring structure. ^13^CβNMR data provide