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Pyrazines and their N-oxides

✍ Scribed by A. S. Elina; I. S. Musatova; G. P. Syrova

Book ID
112334051
Publisher
Springer US
Year
1971
Tongue
English
Weight
282 KB
Volume
4
Category
Article
ISSN
0009-3122

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Pyrazines and their N-oxides
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Negative-ion mass spectra of some pyridi
Negative-ion mass spectra of some pyridines, pyrazines and their N-oxides
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The negative-ion mass spectra of some pyridines, pyrazines and their N-oxides are reported. All of the compounds examined fragment by generation of CN-ions. The alkylated derivatives readily form [M -11 anions. Most of the N-oxides yield 0and OH-ions. Polar substituents control the fragmentation pro

Solvent effects in nuclear magnetic reso
Solvent effects in nuclear magnetic resonance spectra of some pyrazines, pyrimidines and their N-oxides
✍ William W. Paudler; Sharon A. Humphrey πŸ“‚ Article πŸ“… 1971 πŸ› John Wiley and Sons 🌐 English βš– 195 KB

## Abstract The benzene‐induced solvent effects upon the proton chemical shifts of various pyrazines, pyrimidines and their __N__‐oxides are described. Larger chemical shift effects, implying closer benzeneheterocycle association, are noted in the __N__‐oxides as compared to the non‐oxidized hetero