The reactions of 2-, 3-, and 4-(1-vinylpyrrol-2-yl)pyridines with methyl iodide afford the corresponding quaternary salts. Analysis of their H-1 and C-13 NMR spectra showed that the quaternization of the nitrogen atom considerably enhances the pi -acceptor effect of the pyridine ring oil the pyrrole ring and oil the vinyl group. 1-Methyl-2-(1-vinylpyrrol-2-yl)pyridinium iodide contains no weak intramolecular C-H...N hydrogen bond present in the starting compound.