## Abstract NMR spectroscopic studies are undertaken with derivatives of 2βpyrazinecarboxylic acid. Complete and unambiguous assignment of chemical shifts (^1^H, ^13^C, ^15^N) and coupling constants (^1^H,^1^H; ^13^C,^1^H; ^15^N,^1^H) is achieved by combined application of various 1D and 2D NMR spe
13C and 15N NMR spectroscopic investigation on the formation of fossil algal residues
β Scribed by Heike Knicker; Alan W. Scaroni; Patrick G. Hatcher
- Book ID
- 116094843
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 898 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0146-6380
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
It is shown that both I3C and ''N NMR measurements provide similar estimates of the position of the prototropic equilibrium exhibited by 2-hydroxy-3-methylindazole in three solvents. The "N NMR study of the pyridine and pyrrole types of nitrogen atoms provided the most quantitatively reliable result
## Abstract The synthesis and assignment of ^15^N and ^13^C NMR signals of the isoxazole ring in a series of __para__βsubstituted 3βphenyl derivatives are reported. DFT calculations of ^15^N and ^13^C chemical shifts are presented and compared to observed values. Substituent effects are interpreted