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N-Methyl chemical shifts in some 2-, 3- and 4-substituted N-methylpyridinium salts

✍ Scribed by L. W. Deady; G. D. Willett

Publisher: John Wiley and Sons
Year: 1974
Tongue: English
Weight: 200 KB
Volume: 6
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270060114

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✦ Synopsis

Abstract

The chemical shifts of the N‐methyl group in a series of 2‐, 3‐ and 4‐substituted N‐methylpyridinium salts have been measured in DMSO solution. The shift is primarily affected by resonance interaction between the substituent and aza group, and the results suggest that the resonance effect from a 2‐substituent is at least as great as from the corresponding 4‐substituent.

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