Derivatives of pyrazinecarboxylic acid:  1 H,  13 C and  15 N NMR spectroscopic investigations | Zendy

Holzer Wolfgang | Zendy; Eller Gernot A. | Zendy; Datterl Barbara | Zendy; Habicht Daniela | Zendy

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Derivatives of pyrazinecarboxylic acid: 1 H, 13 C and 15 N NMR spectroscopic investigations

Author(s) -

Holzer Wolfgang,

Eller Gernot A.,

Datterl Barbara,

Habicht Daniela

Publication year - 2009

Publication title -

magnetic resonance in chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0749-1581

DOI - 10.1002/mrc.2437

Subject(s) - chemistry , coupling constant , tautomer , chemical shift , nmr spectra database , carbon 13 nmr satellite , nuclear magnetic resonance spectroscopy , spectral line , analytical chemistry (journal) , stereochemistry , crystallography , computational chemistry , fluorine 19 nmr , organic chemistry , physics , particle physics , astronomy

NMR spectroscopic studies are undertaken with derivatives of 2‐pyrazinecarboxylic acid. Complete and unambiguous assignment of chemical shifts ( 1 H, 13 C, 15 N) and coupling constants ( 1 H, 1 H; 13 C, 1 H; 15 N, 1 H) is achieved by combined application of various 1D and 2D NMR spectroscopic techniques. Unequivocal mapping of 13 C, 1 H spin coupling constants is accomplished by 2D (δ, J ) long‐range INEPT spectra with selective excitation. Phenomena such as the tautomerism of 3‐hydroxy‐2‐pyrazinecarboxylic acid are discussed. Copyright © 2009 John Wiley & Sons, Ltd.

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