Solvent effects in nuclear magnetic resonance spectra of some pyrazines, pyrimidines and their N‐oxides | Zendy

Paudler William W. | Zendy; Humphrey Sharon A. | Zendy

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Solvent effects in nuclear magnetic resonance spectra of some pyrazines, pyrimidines and their N‐oxides

Author(s) -

Paudler William W.,

Humphrey Sharon A.

Publication year - 1971

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.1270030207

Subject(s) - chemical shift , solvent , benzene , chemistry , proton , proton magnetic resonance , spectral line , solvent effects , photochemistry , solvent exposure , organic chemistry , nuclear magnetic resonance , physics , quantum mechanics , astronomy

The benzene‐induced solvent effects upon the proton chemical shifts of various pyrazines, pyrimidines and their N ‐oxides are described. Larger chemical shift effects, implying closer benzeneheterocycle association, are noted in the N ‐oxides as compared to the non‐oxidized heterocycles. The solvent‐induced chemical shift changes can be used to establish the site of N ‐oxidation in those instances where different isomers can be formed.

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