17O NMR studies of boronic acids and their derivatives
✍ Scribed by Gierczyk, Błażej; Kaźmierczak, Marcin; Schroeder, Grzegorz; Sporzyński, Andrzej
- Book ID
- 118273975
- Publisher
- Royal Society of Chemistry
- Year
- 2013
- Tongue
- English
- Weight
- 932 KB
- Volume
- 37
- Category
- Article
- ISSN
- 1144-0546
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📜 SIMILAR VOLUMES
## Abstract ^17^O NMR data for some 3‐arylidenechromanones and ‐flavanones are discussed in terms of mesomeric and steric substituent interactions. The transmission of long‐range substituent effects was studied. ^17^O NMR chemical shifts were correlated with Hammett σ~p~^+^ values for 4′‐substitute
## Abstract ^17^O NMR data for 52 phenoxyethyl derivation have been measured and assigned. Copyright © 2003 John Wiley & Sons, Ltd.
N M R studies were conducted on the a-COOH groups of the amino acids Val, Leu, Ile, His and Pro and on the y-COOH group of Glu. Limit chemical shifts, downfield from external water, were 249-257 ppm in aqueous solution at low pH, and 234-243 ppm in HS0,F. The relative nuclear screening order for a-C