Polarographic Study of Acid-Base Reactions of the Tropylium Ion

Details Polarographic Study of Acid-Base Reactions of the Tropylium Ion Polarographic Study of Acid-Base Reactions of the Tropylium Ion

Nov 1958

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1958natur.182.1535z&link_type=abstract

Nature, Volume 182, Issue 4648, pp. 1535-1536 (1958).

Physics

Scientific paper

A POLAROGRAPHIC study of the tropylium ion (C7H7+) in unbuffered media1 did not permit any quantitative interpretation of the acid-base phenomena at the surface of the mercury dropping electrode. We therefore followed the reduction of the tropylium ion in well-buffered media. At concentrations lower than about 0.00015 M one irreversible reduction wave was observed. The height of this wave decreased with increasing pH in the form of a dissociation curve (Fig. 2) with pK' = 5.64 at t1 = 3.3 sec. The kinetic current at higher pH values is limited by the rate of formation of the reducible tropylium cation from electro-inactive tropyl alcohol, which is present in the solution and is brought by diffusion to the surface of the mercury electrode.

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