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Nitrogen NMR sudies of some 15N labelled sydnones and related stuctures

✍ Scribed by L. Stefaniak; M. Witanowski; B. Kamieński; G. A. Webb

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
213 KB
Volume
13
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^15^N NMR studies on some signly labelled sydnones, N‐acetylsydonimines and their hydrochlorides, as well as those on some sydnonimine hydrochlorides, show that in each case protonation takes place at the exocyclic moiety, \documentclass{article}\pagestyle{empty}\begin{document}$ - {\rm O}^ \ominus - \mathop {\rm N}\limits^ \ominus {\rm COCH}_3 ,{\rm or}, - \mathop {{\rm NH}}\limits^ \ominus $\end{document}, respectively. Complete assignments of the nitrogen chemical shifts are possible for the labelled compounds, including the isomeric structures of N‐alkyl–N‐cyanomethyl–N–nitrosoamines to which, unstable, free sydnonimines are converted.

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