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Proton and carbon-13 NMR studies of 1-substituted pyridinium salts

✍ Scribed by Alan R. Katritzky; Zofia Dega-Szafran

Publisher: John Wiley and Sons
Year: 1989
Tongue: English
Weight: 282 KB
Volume: 27
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260271113

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✦ Synopsis

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 estimated for replacing YCH,H with YCH,Py+. The effects of 1 -substituents on the pyridinium ring chemical shifts are discussed.

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