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Nitrogen‐15 nuclear magnetic resonance spectroscopic study of compounds with nitrogennitrogen bonds
Author(s) -
Yavari Issa,
Roberts John D.
Publication year - 1982
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270200409
Subject(s) - chemistry , nitrogen , substituent , hydrogen bond , nuclear magnetic resonance spectroscopy , solvent , dimethyl sulfoxide , crystallography , stereochemistry , organic chemistry , molecule
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 (NN) nitrogens are 300–500 ppm deshielded compared with hydrazo (NHNH) 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 NNO bonds.