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Nitrogen-15 nuclear magnetic resonance spectra of ketenimines

✍ Scribed by Karl Eberl; John D. Roberts

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
173 KB
Volume
17
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Nitrogen‐15 NMR spectra of 11 ketenimines have been taken both at the natural‐abundance level of ^15^N and with the aid of ^15^N‐labeling. The nitrogen chemical shifts are substantially different from those of neutral imines and are upfield, more like those of protonated imines. The results are in accord with significant delocalization of the nitrogen lone‐pair. Furthermore, there is a rough parallelism between the ^13^C shifts of the terminal carbons and the ^15^N shifts.

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