ISSN:
0030-4921
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Nitrogen-15-hydrogen 2J(15NH), 15N, 13C 1J(15N13C) and 13C, H 1J(13CH) coupling constants have been measured and their signs determined for cis-and trans-[9-anthryl(13C)methylene](2H3)methylamine (15N)-oxide. Values of 2J(15NH) were of similar magnitude (∼2 Hz) but were of opposite sign. The results are compared and contrasted with those reported for related imino and quaternary imino systems. Vicinal 3J(15NH) coupling constants have been measured in cis- and trans-15N-[1-(α-naphthyl)ethylidene]benzylamine and 15N-[1-(p-nitrophenyl)ethylidene]-t-butylamine and were found to be larger when the imino methyl group was cis to the nitrogen lone pair. The corresponding cis and trans ketonitrones formed by photoisomerization of the derived oxaziridines had 3J(15NH) values of c. 3.3 Hz. A study of the signs and magnitudes of observed and calculated 15N,H coupling constants for all of the 15N labelled imines, oxaziridines, imine N-oxides (nitrones) and similar model systems which were synthesized is described.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1270140620
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