Collect. Czech. Chem. Commun. 1994, 59, 2375-2382

Electrosynthesis of Organic Amalgam from Tetraethylammonium Tetrafluoroborate in Aqueous Medium

Simon Krásenský and Marie Studničková

Department of Theoretical and Physical Chemistry, Masaryk University, 611 37 Brno, Czech Republic


The electroreduction of neutral aqueous solutions of 0.1 - 0.5 M Et4NBF4 on a mercury cathode at room temperature at -2.8 - -2.4 V produces a black precipitate of Et4N . Hgx with simultaneous evolution of hydrogen (the pH value increases to 12). No anodic oxidation of the amalgam has been observed in the interval of 0 - 2.8 V. The composition of the precipitate, collected by filtration under nitrogen, has been determined from the decrease of Et4N+ in the solution after electrolysis and from analysis of mercury in the binary compound Et4N . Hgx. The value x = 2.9 ± 0.8 has been found.