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The Largest 15N–15N Coupling Constant Across an NHN Hydrogen Bond

✍ Scribed by Mariusz Pietrzak; Andrew C. Try; Bruno Andrioletti; Jonathan L. Sessler; Pavel Anzenbacher Jr.; Hans-Heinrich Limbach

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 364 KB
Volume: 47
Category: Article
ISSN: 0044-8249
DOI: 10.1002/anie.200704411

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The Largest 15N–15N Coupling Constant Ac

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I3C and I5N NMR data are reported for two substituted nitronaphthalenes l,S-bis(4-toluenesulphonamido)-2,4,7-trinitronaphthalene and l,S-bis(4-toluenesulphonamido)-2,4,5,7-tetranitronaphthalene and their salts with 1,s-dimethylaminonaphthalene. The salts are shown to contain NHN + and NHN-intramolec

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## Abstract An indirect method is employed for determining the ^15^N parameters at the natural abundance level in a series of simple acyclic and cyclic amides. The one bond coupling constant, ^1^__J__(^15^N^1^H), and the ^15^N chemical shift are measured as a function of the carbonyl substituent gr

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The sign 'J(NN) of 2-chlor0-6-methyl-['~N,]pyrimidine has been determined by 'H-('H (selective), "N (selective)} and 13C-(1H (noise), I5N (selective)} triple resonance techniques. The sign was proved to be negative (-1.6 Hz); consequently, chlorine substitution at C-2 was found to make ' . I ( " ) m