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Nitrogen-15 nuclear magnetic resonance spectroscopic study of compounds with nitrogennitrogen bonds

✍ Scribed by Issa Yavari; John D. Roberts

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
268 KB
Volume
20
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^15^N NMR spectra of several substances with nitrogen—nitrogen bonds have been obtained at the natural‐abundance level by high‐resolution NMR spectroscopy. Azo (NN) nitrogens are 300–500 ppm deshielded compared with hydrazo (NHNH) nitrogens. The sensitivity of the ^15^N shifts in these types of substances to substituent changes are reported, along with ^15^N–^1^H spin–spin couplings for some hydrazo compounds. Hydrogen‐bonding effects arising from solvent changes on the ^15^N shifts of azoxybenzene are different for its two kinds of nitrogen. The ^15^N NMR spectrum of N,N'‐dinitrosopiperazine in dimethyl sulfoxide at room temperature is consistent with the presence of two different conformations about the NNO bonds.

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