Nitrogen‐15 nuclear magnetic resonance spectroscopy. Natural abundance nitrogen‐15 spectra of the  cis  and  trans  isomers of secondary alkylformamides | Zendy

Nakanishi Hiroshi | Zendy; Roberts John D. | Zendy

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Nitrogen‐15 nuclear magnetic resonance spectroscopy. Natural abundance nitrogen‐15 spectra of the cis and trans isomers of secondary alkylformamides

Author(s) -

Nakanishi Hiroshi,

Roberts John D.

Publication year - 1981

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.1270150103

Subject(s) - formamides , chemistry , chemical shift , substituent , cis–trans isomerism , nitrogen , abundance (ecology) , nuclear magnetic resonance spectroscopy , spectroscopy , spectral line , computational chemistry , nuclear magnetic resonance , stereochemistry , organic chemistry , formamide , physics , astronomy , biology , quantum mechanics , fishery

The 15 NMR chemical shifts were measured of a number of N ‐substituted formamides and acetamides at the natural abundance level. The ratios of the cis and trans isomers for several N ‐alkylformamides were also determined. Substituent effects on the 15 N chemical shifts of formamides are compared with those of some other nitrogen‐containing compounds. There is a consistent pattern of behavior of the one bond spin–spin coupling constants [ 1 J ( 15 NH)] wherein the trans isomers of N ‐alkylformamides are larger than those of the cis isomers.

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