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Microwave spectra of [13C] and [15N] pyridine N-oxides and a preliminary ring structure

✍ Scribed by Ole Snerling; Claus Jórgen Nielson; Lise Nygaars; Erik Jonas Pedersen; Georg Ole Sørensen

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
546 KB
Volume
27
Category
Article
ISSN
0022-2860

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## Abstract The ^13^C chemical shifts of 37 pyrazines, including their __N__‐oxides, are reported. Substituent effects of methyl, phenyl and __N__‐oxide groups on the chemical shifts were examined. To comprehend these effects, the chemical shifts were compared with charge densities calculated by th