13C and proton NMR spectra of 2(1H)pyrazinones |
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Authors: | JC MacDonald GG Bishop M Mazurek |
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Institution: | National Research Council of Canada, Prairie Regional Laboratory, Saskatoon, Saskatchewan, Canada S7N OW9 |
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Abstract: | 13C and proton NMR spectra data are given for eleven 2(1H)pyraziones. Assignments of chemical shifts were made by methods which included: deuterium exchange with certain protons of 3-alkyl substituents; change of chemical shifts of certain carbon atoms with change in pH; the use of long-range coupling constants for 13C to protons; and various correlations among assigned spectra. |
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