Effect of ammonium ions on the polarographic behavior of nitriles and amides of some pyridinecarboxylic acids

The character of the polarographic reduction of picolinonitrile, nicotinonitrile, isonicotinonitrile, isocinchomeronic acid dinitrile, picolinamide, and nicotinamide on a dropping mercury electrode with a buffer-solution base electrolyte in the presence of ammonium ions depends on the concentration of the ammonium ions, which interact with the ring nitrogen.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 353–355, March, 1973.