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13C n.m.r. investigation on the nitrogen methylation of some azabenzenes

✍ Scribed by Peter Van De Weijer; Chandra Mohan

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
277 KB
Volume
9
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^1^H and ^13^C n.m.r. spectra of N‐methylated pyridine, pyridazine, pyrimidine and pyrazine and N,N‐dimethylated pyrimidine and pyrazine have been recorded and analysed. The change in the ^13^C chemical shifts under the influence of N‐methylation (Δδ) in the diazabenzenes could be predicted by the Δδ values of pyridine. A comparison of the Δδ values of N‐methylation with those of N‐protonation showed that both reactions have a similar effect.

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