Proton and carbon-13 NMR studies of 1-su
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Alan R. Katritzky; Zofia Dega-Szafran
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Article
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1989
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John Wiley and Sons
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English
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H and 13C NMR chemical shifts of a series of 1 -substituted pyridinium salts were measured in dimethyl sulfoxide. The effect of the quaternary pyridinium ring on the resonance of the methylene group of the substituent is reported. Increments of 6'H = 3.89 f 0.1 6 ppm and 6' 3C = 47.5 f 3.7 ppm are e